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2024 Form 4 Instructions for Non-Combined Franchise Income Tax Return

Table of Contents

Who Must File Form 4 ............................................................................................................................................. 2
Corporations Required to File ................................................................................................................................................ 2
“Doing Business in Wisconsin” .............................................................................................................................................. 3
Franchise or Income Tax ....................................................................................................................................................... 4
Economic Development Surcharge ....................................................................................................................................... 5

Separate Return or Combined Return? ................................................................................................................ 5
Combined Returns and Groups in General ............................................................................................................................ 5
Test 1: Commonly Controlled Group...................................................................................................................................... 5
Test 2: Unitary Business ........................................................................................................................................................ 6
Test 3: Water’s Edge ............................................................................................................................................................. 8

General Franchise or Income Tax Return Instructions ....................................................................................... 9
When and Where to File ........................................................................................................................................................ 9
Period Covered by Return ................................................................................................................................................... 10
Accounting Methods and Elections ...................................................................................................................................... 10
Payment of Estimated Tax ................................................................................................................................................... 10
Required Disclosures and Attachments ............................................................................................................................... 11
Internal Revenue Service Adjustments, Amended Returns, and Claims for Refund ............................................................ 12
Final Return ......................................................................................................................................................................... 13
Penalties for Not Filing or Filing Incorrect Returns ............................................................................................................... 13

Conformity with Internal Revenue Code and
Exceptions ............................................................................................................................................................. 13
Provisions of the Internal Revenue Code Not Adopted by Wisconsin: ................................................................................. 14
Capital Losses ..................................................................................................................................................................... 19
Limitations on Certain Federal Deductions .......................................................................................................................... 19
Differences Between Federal and Wisconsin Basis of Assets ............................................................................................. 19

General Instructions for Apportionment ............................................................................................................ 19
Who Must Use Apportionment ............................................................................................................................................. 20
Apportionment Method......................................................................................................................................................... 20
Nonapportionable Income .................................................................................................................................................... 21
Separately Apportioned Income ........................................................................................................................................... 21
Corporate Partners or LLC Members ................................................................................................................................... 21
Separate Accounting............................................................................................................................................................ 21

Treatment of Specialized Industries and Entities .............................................................................................. 22
Foreign Sales Corporations (FSCs) ..................................................................................................................................... 22
Interest Charge Domestic International Sales Corporations (IC-DISCs) .............................................................................. 22
Insurance Companies .......................................................................................................................................................... 22
Personal Holding Companies .............................................................................................................................................. 22
RICs, REMICs, REITs, and FASITs ..................................................................................................................................... 23
Tax Exempt Organizations ................................................................................................................................................... 23
Urban Transit Companies .................................................................................................................................................... 23

Line-by-Line Instructions for Form 4 .................................................................................................................. 23

Additional Information, Assistance, and Forms ................................................................................................ 32
Web Resources .................................................................................................................................................................. 32
Obtaining Forms ................................................................................................................................................................ 32

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2024 Form 4 Instructions for Non-Combined Franchise Income Tax Return

NOTE: It may be helpful to also have a copy of the instructions to the following forms and schedules that are
frequently required to be filed with Form 4:
• For corporations apportioning their income, Schedule A-01, A-02, A-03, A-04, A-05, A-06, A-07, A-08, A-09,
A-10, or A-11
• Schedule 4V, Wisconsin Additions to Federal Income
• Schedule 4W, Wisconsin Subtractions From Federal Income
• Schedule 4Y, Wisconsin Subtraction Modification for Dividends

Who Must File Form 4

Corporations Required to File

Form 4 is for corporations only. “Corporation” includes corporations, joint stock companies, associations, common
law trusts, and all other entities treated as corporations under section 7701 of the Internal Revenue Code (IRC).
Corporations that must file Form 4, if not otherwise exempt, include:
• Corporations doing business both in and outside Wisconsin (multistate corporations)
• Corporations doing business only in Wisconsin
• Domestic insurance companies doing business in Wisconsin
• Unlicensed corporations doing business in Wisconsin.
• Foreign corporations engaged in buying or selling lottery prizes if the winning tickets were originally bought in
Wisconsin.
• Foreign corporations issuing credit, debit, or travel and entertainment cards to customers in Wisconsin.
• Foreign corporations regularly selling products or services of any kind or nature to customers in Wisconsin that
receive the product or service in Wisconsin.
• Foreign corporations regularly soliciting business from potential customers in Wisconsin.
• Foreign corporations regularly performing services out-side Wisconsin for which the benefits are received in
Wisconsin.
• Foreign corporations regularly engaging in transactions with customers in Wisconsin that involve intangible
property and result in receipts flowing to the taxpayer from within Wisconsin.
• Foreign corporations holding loans secured by real or tangible personal property located in Wisconsin.
• Foreign corporations owning, directly or indirectly, a general or limited partnership interest in a partnership that
does business in Wisconsin, regardless of the percentage of ownership.
• Foreign corporations owning, directly or indirectly, an interest in a limited liability company treated as a partnership
that does business in Wisconsin, regardless of the percentage of ownership.
• Foreign corporations that are the sole owner of an entity that is disregarded as a separate entity under sec. 7701,
IRC, and does business in Wisconsin.

In the list above, “regular" and “regularly" mean 15 or more days of activity. Fifteen days of activity means one person
for 15 days or 15 persons for one day, or any combination of persons and days that results in at least 15 person-days
of activity. “Days of activity” include any day, or portion thereof, upon which business activity took place. “Days of
activity” do not include travel days, holidays, or weekends, unless business activities were conducted on those days.

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
Tax-option (S) corporations file Form 5S.  

Tax exempt corporations may be required to file Form 4T.  

Additionally, some corporations must file a Wisconsin corporation franchise or income tax return (Form 4, 5S, or 4T, 
as applicable) regardless of whether they are otherwise “doing business in Wisconsin.” These corporations include: 
•  Corporations organized under Wisconsin law 
•  Foreign corporations licensed to do business in Wisconsin 
•  Foreign corporations that are the sole owner of an entity that is disregarded as a separate entity under sect. 7701, 
 IRC, and does business in Wisconsin 
•  Foreign corporations engaged in buying or selling lottery prizes if the winning tickets were originally bought in 
 Wisconsin 

Corporations and Other Entities Not Required to File 
  
The following entities are not required to file a Wisconsin corporation franchise or income tax return: 
  
•  Single-owner entities that are disregarded under sec. 7701, IRC (Instead, the owner of the disregarded entity must 
 file a Wisconsin franchise or income tax return if otherwise required.) 
•  “Exempt entities,” except those that have income described in a. through c.: 
 a.  Unrelated business taxable income as defined in sec. 512, IRC, 
 b.  Income derived from a health maintenance organization (HMO) as defined in sec. 609.01(2), Wis.  Stats., or a 
  limited service health organization (LSHO) as defined in sec. 609.01(3), Wis. Stats., or 
 c.  Income realized from the sale of and subsequent sale or redemption of lottery prizes if the winning tickets were 
  originally bought in Wisconsin. 
•  Corporations that are completely inactive in and outside Wisconsin and have filed Form 4H 
•  Credit unions that don’t act as a public depository for state or local government funds and have filed Form CU. 
  
“Exempt Entities.”  Exempt entities are described in secs. 71.26(1) and 71.45(1), Wis. Stats. Exempt entities include 
the following: 
•  Insurers exempt from federal income taxation under sec. 501(c)(15), IRC 
•  Town mutual insurers organized under Chapter 612, Wis. Stats. 
•  Foreign insurers 
•  Domestic insurers engaged exclusively in life insurance business 
•  Domestic  insurers  transacting  mortgage  guaranty  insurance  business  as  defined  in  Wisconsin  Administrative 
 Code section Insurance 6.75(2)(i) 
•  Some cooperatives 
•  Religious, scientific, educational, benevolent, or other corporations or associations of individuals not organized or 
 conducted for profit  

“Doing Business in Wisconsin” 

“Doing business in Wisconsin” means that the corporation has “nexus” with Wisconsin. Activities that create nexus 
include the following: 
•  Maintaining any business location in Wisconsin 
•  Owning real estate in Wisconsin 

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

• Ownership of tangible personal property in Wisconsin, including inventory held by a distributor, consignee, or other
non-employee representative, whether or not used to fill orders for the owner's account, but not including personal
property for use in an employee's or representative's home, residential office or automobile that is solely limited
to conducting the activities protected by P.L. 86-272.
• Regular activity in Wisconsin by employees or representatives soliciting orders with authority to approve them
• Regularly soliciting business from potential customers in Wisconsin, except where protected by P.L. 86-272
• Regularly selling products or services of any kind or nature to customers in Wisconsin that receive the product or
service in Wisconsin, except where protected by federal Public Law (P.L.) 86-272
• Regularly performing services outside Wisconsin for which the benefits are received in Wisconsin
• Regularly engaging in transactions with customers in Wisconsin that involve intangible property and result in
receipts flowing to the corporation from within Wisconsin
• Issuing credit, debit, or travel and entertainment cards to customers in Wisconsin
• Holding loans secured by real or tangible personal property located in Wisconsin
• Owning, directly or indirectly, a general or limited partnership interest in a partnership that does business in Wis-
consin, regardless of the percentage of ownership
• Owning, directly or indirectly, an interest in a limited liability company treated as a partnership that does business
in Wisconsin, regardless of the percentage of ownership

For corporations selling tangible personal property, P.L. 86-272 may prohibit Wisconsin taxation in some cases.
There are also specific statutory exemptions from nexus. See sec. Tax 2.82, Wisconsin Administrative Code, for
more information about P.L. 86-272 and what creates nexus. See sec. 71.23(3), Wis. Stats., for the specific statutory
exemptions that may apply.

Franchise or Income Tax

Corporations required to file Form 4 may be subject to either franchise or income tax.

Franchise tax applies to:
• All domestic corporations (those organized under Wisconsin law), and
• Foreign corporations (those not organized under Wisconsin law) doing business in Wisconsin or buying or selling
lottery prizes if the winning tickets were originally bought in Wisconsin, except where taxation is exempted by
statute or barred by federal law.

The tax rate is 7.9%. Income from obligations of the United States government and its instrumentalities is included in
income under the franchise tax law.

Income tax applies only to foreign corporations which are not subject to the franchise tax and which own property in
Wisconsin or whose business in Wisconsin is exclusively in foreign or interstate commerce. The tax rate is 7.9%.
Income from obligations of the United States government and its instrumentalities is not included in income under the
income tax law.

Certain urban transit companies are subject to a special tax under sec. 71.39, Wis. Stats. Contact the department
for further information.

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

Economic Development Surcharge

Corporations required to file Form 4 may also be subject to the economic development surcharge. The economic
development surcharge is 3% of the corporation’s franchise or income tax, before applying credits. The minimum
economic development surcharge is $25 and the maximum is $9,800.

A corporation is subject to the economic development surcharge if it has gross receipts from all activities of $4 million
or more during the taxable year. “Gross receipts from all activities” means gross receipts, gross sales, gross divi-
dends, gross interest income, gross rents, gross royalties, the gross sales price from the disposition of capital assets
and business assets, gross receipts passed through from other entities, and all other receipts that are included in
gross income for Wisconsin franchise or income tax purposes.

However, the economic development surcharge doesn’t apply to:
• Domestic corporations that don’t have any business activities in Wisconsin,
• Foreign corporations that don’t have nexus with Wisconsin, or
• Nuclear decommissioning trust funds.

For more information on the economic development surcharge, refer to Publication 400, Wisconsin’s Economic
Development Surcharge. You can find this publication on the Department of Revenue’s web site at
revenue.wi.gov/Pages/HTML/taxpubs.aspx,

Separate Return or Combined Return?

Use this section to determine if the corporation must be included in a combined return. If so, see the Form 6 Instruc-
tions for Combined Returns.

Combined Returns and Groups in General

If a corporation is in a combined group, it should not file a separate Form 4, instead, one corporation in the group,
called the “designated agent,” files Form 6 for the group as a whole.

A corporation is in a combined group if it meets all the following three tests:
1. The corporation is in a commonly controlled group,
2. The corporation is engaged in a unitary business with other corporations in the commonly controlled group, and
3. The corporation is not excluded from the combined group under the water’s edge rules.

However, corporations that are tax-option (S) corporations, real estate investment trusts (REITs), regulated invest-
ment companies (RICs), real estate mortgage investment conduits (REMICs), or financial asset securitization invest-
ment trusts (FASITs) can’t be included in a combined group. These corporations must file separate Wisconsin returns
if they are otherwise required to file.

Each of the three tests is discussed below:

Test 1: Commonly Controlled Group

Section 71.255(1)(c), Wis. Stats., and sec. Tax 2.61(3), Wisconsin Administrative Code, describe when a “commonly
controlled group” exists. To summarize those provisions, a “commonly controlled group” means any or a combination
of the following arrangements, if the “50% test” described below is met:
• A parent-subsidiary chain of corporations
• Corporations with a common owner
• Corporations owned or controlled by members of the same family

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

• Corporations that are “stapled entities”

50% Test. In any commonly controlled group, there must be common ownership of stock representing more than
50% of the voting power of the corporations. A corporation owns stock representing more than 50% of voting power
if it owns or controls more than 50% of all classes of stock entitled to vote. See sec. Tax 2.61(3)(d), Wisconsin
Administrative Code, for other rules that apply in determining voting power.

The common ownership may be either direct or indirect. To determine if there is indirect ownership, you would gen-
erally use the stock attribution rules of sec. 318, IRC. See sec. Tax 2.61(3)(a), Wisconsin Administrative Code, for
more details.

Following is a brief description of each type of commonly controlled group:

Parent-Subsidiary Chain. In this type of group, a parent corporation directly or indirectly owns stock representing
more than 50% of the voting power of one or more corporations or chains of corporations in the group.

Corporations with Common Owner. In this type of group, a common owner directly or indirectly owns stock repre-
senting more than 50% of the voting power of the corporations in the group. The common owner may or may not be
a corporation.

Corporations Owned or Controlled by Family Members. In this type of group, stock representing more than 50%
of the voting power in each corporation is directly owned by, or for the benefit of, members of the same family, as
determined by the third degree of kinship under sec. 990.001(16), Wis. Stats. Using the third degree of kinship, an
individual is deemed to be in the same family with their:
• Parents
• Grandparents
• Great-grandparents
• Children
• Grandchildren
• Great-grandchildren
• Siblings
• Nieces and nephews
• Aunts and uncles

Stapled Entities. In this type of group, there is an arrangement where stock representing more the 50% of the voting
power of each corporation cannot be separately transferred, even if there is not actual common ownership of the
stock. If a group of corporations would be considered “stapled entities” under sec. 269B, IRC, without regard to
whether the corporations are foreign or domestic, then the corporations are in a commonly controlled group. See sec.
Tax 2.61(3)(d), Wisconsin Administrative Code, for details.

Test 2: Unitary Business

In general, a “unitary business” is a group of commonly controlled companies, divisions, or branches that operates
as a unit. The operations are integrated, and each company, division, or branch is dependent upon or contributory to
the operation of the business as a whole. However, it isn’t necessary that each component of the business contribute
to all the other components.

Controlled Group Election. A commonly controlled group may elect to forego the unitary business test by treating
the entire commonly controlled group as a single unitary business. This is called the “controlled group election.”

NOTE: The controlled group election may simplify combined return filing because it eliminates the need to
determine which corporations in the commonly controlled group are engaged in the same unitary business.

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
If the group makes the controlled group election, the election is generally binding on the combined group and the 
department for a ten-year period, unless the group no longer has a filing requirement. For information on the con-
trolled group election, see the instructions for page one of the Form 6, Wisconsin Combined Corporation Franchise 
or Income Tax Return.       

How  to  Identify  a  “Unitary  Business.”  If  the  commonly  controlled  group  does  not  make  the  controlled  group 
election, it uses the definition in sec. 71.255(1)(n), Wis. Stats., and guidance provided in sec. Tax 2.62, Wisconsin 
Administrative Code, to determine if corporations in the commonly controlled group are engaged in the same unitary 
business. The law provides the following: 
•  Commonly controlled entities are engaged in a unitary business if their activities generate a synergy and mutual 
 benefit that produces a sharing or exchange of value among them and a significant flow of value to the separate 
 parts  
•  Commonly controlled entities are presumed to be a unitary business if the entities have unity of operation and use 

The  Wisconsin  Statutes  and  Administrative  Code  provide  further  explanation  and  examples  of  the  “sharing, 
exchange, and flow  of value” concept and the “unity of ownership, operation and use” concept, summarized as 
follows: 

Sharing, Exchange, and Flow of Value.       Commonly controlled corporations are engaged in a unitary business if 
any of the following are true: 

•  The corporations contribute or are expected to contribute in a nontrivial way to each other’s profitability 
•  The corporations are dependent on one another for achieving one or more nontrivial business objectives 
•  The corporations taken as a group offer one or more corporations in the group some economies of scale or 
 economies of scope 

To illustrate this concept, the following activities between commonly controlled corporations indicate that they are 
engaged in the same unitary business:  

•  Assisting in acquisition of assets 
•  Assisting with filling personnel needs 
•  Lending funds, guaranteeing loans, or pledging assets 
•  Common future planning or development of the enterprise 
•  Providing technical assistance, general operational guidance, or overall operational strategic advice 
•  Supervising 
•  Sharing use of trade names, patents, or other intellectual property 

Unity of Operation and Use. Commonly controlled corporations are also engaged in a unitary business if they have 
both unity of operation and unity of use.  

Unity of operation means there is functional integration among the corporations, and is evidenced by shared support 
functions such as:  

•  Centralized purchasing, marketing, advertising, accounting, or research and development 
•  Intercorporate sales or leases, including equipment and real estate 
•  Intercorporate services, including administrative, data management, computer support, employee benefits, human 
 resources, insurance, tax compliance, legal, financial, and cash management services 
•  Intercorporate debts 
•  Intercorporate use of proprietary materials, including trade names, trademarks, service marks, patents, copyrights, 
 and trade secrets 

Unity of use is evidenced by centralized management or use of centralized policies. Factors that indicate unity of use 
include:  

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
•  Centralized executive force 
•  Interlocking directorates or corporate officers 
•  Intercompany employee transfers 
•  Common employee and executive training programs 
•  Common hiring and personnel policies 
•  Common recruiting programs 
•  Common employee handbooks 
•  Common employee benefit programs 

Passive Holding Companies in Unitary Business.     If a commonly controlled group includes a passive holding 
company that holds intangible assets that are used by other companies of the group in a unitary business, that holding 
company is deemed to be engaged in the unitary business, even if its activities are primarily passive. 

If  a  passive  parent  holding  company  directly  or  indirectly  controls  one  or  more  operating  company  subsidiaries 
engaged in a unitary business, that passive parent holding company is also engaged in the unitary business, even if 
its activities are primarily passive. 

Presumptions to Simplify Determination.   To simplify the determination of whether a unitary business exists, sec. 
Tax 2.62(6), Wisconsin Administrative Code, provides that a group of commonly controlled corporations is presumed 
to be engaged in a unitary business if any of the following are true: 

•  The group’s activities are all in the same general line of business 
•  The members of the group are engaged in different steps of a vertically structured enterprise 
•  There is strong central management coupled with the existence of centralized departments or affiliates for such 
   functions as financing, advertising, R&D, or purchasing 

Also, if a corporation forms a new corporation, the forming corporation and new corporation are presumed to be 
engaged in a unitary business with one another from the date of formation. 

These presumptions may be rebutted by the taxpayer or by the department based on the specific facts and circum-
stances. 

Test 3: Water’s Edge 

In general, this test only applies if the company derives 80% or more of its worldwide gross income from “active 
foreign business income,” which means gross income derived from sources outside the United States, as determined 
in subchapter N of the Internal Revenue Code, including income of a subsidiary corporation, and attributable to the 
active conduct of a trade or business in a foreign country or in a U.S. possession.  A corporation is considered a 
subsidiary if the parent corporation owns, directly or indirectly, stock with at least 50 percent of the total voting power 
of the corporation and the stock has a value equal to at least 50 percent of the total value of the stock of the corpo-
ration. The water’s edge rules are described in detail in the instructions for Form 6, Wisconsin Combined Corporation 
Franchise or Income Tax Return.  
 
 SUMMARY: A corporation must file in a combined return if all of the following are true: 
 1. The corporation is in a commonly controlled group,  
 2. The  corporation  is  engaged  in  a unitary  business  with  one  or  more  other  corporations  in  that  commonly 
    controlled group or the group makes the controlled group election, and 
 3. The corporation is not excluded from the combined group under the  water’s edge rules. 
                                                                                                                          
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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
General Franchise or Income Tax Return Instructions

When and Where to File 

Generally, a corporation must file its Wisconsin franchise or income tax return by the 15th day of the  4th month 
following the close of its taxable year; however, corporations with a fiscal year ending June 30 are due the 15th day 
of the 3rd month after the close of the taxable year (September 15).    

Short Period Returns. Corporations must file short period returns for Wisconsin if required to do so for federal 
purposes. A Wisconsin return for a short taxable year is due on or before the federal due date for that short taxable 
year.  

  NOTE: Be sure to use the correct year's tax return when filing for a short period.  If the tax returns are not yet 
  available, wait until the returns become available and file under extension.  For example, if a taxpayer has a short 
  period from January 1, 2024 through March 31, 2024, the 2024 Form 4 will not be ready by July 15, 2024 (unex-
  tended due date for a March 31 year-end).  Wisconsin law provides for an automatic 7-month extension to file the 
  return, so filing under extension will allow the correct years return to be filed when the 2024 Form 4 is available 
  (typically the middle of November 2024).  Note that an extension does not extend the time to pay a balance due.  
  To avoid interest charges, pay the amount due by the unextended due date.    
   
Extensions. Any extension allowed by the IRS for filing the federal return automatically extends the Wisconsin due 
date to 30 days after the federal extended due date. You don’t need to submit either a copy of the federal extension 
or an application for a Wisconsin extension to the department by the original due date of your return. However, you 
must submit a copy of the federal extension with the Wisconsin return that you file. 

If you aren’t requesting a federal extension, Wisconsin law provides an automatic extension of 7 months or until the 
original due date of the corporation’s corresponding federal return, whichever is later.  

Disaster Relief Extension. If you are filing under extension because of a federal or state disaster, include a state-
ment indicating which disaster extension you are using and attach it to your return. Additional information on disaster 
areas can be found here:  revenue.wi.gov/Pages/FAQS/pcs-extensn.aspx#ext5 

The fee for filing a late return after the extension date is $150.  

 CAUTION: An extension for filing the return doesn’t extend the time to pay the franchise or income tax. Interest will 
 be charged on the tax not paid by the 15th day of the 4th month (3rd month for June 30 year-end) following the 
 close of the taxable year. You can avoid interest charges during the extension period by paying the tax due by that 
 date.  
                                                                                                                           
Filing Methods.   Corporate returns are required to be filed electronically unless an approved electronic waiver is 
received from the department. Paper filed returns that do not have an electronic filing waiver attached will be returned. 
See sec. Tax 2.03(3)(b)(1), Wisconsin Administrative Code, for details.  

File electronically through the Federal/State E-Filing Program. For a list of software vendors participating in this pro-
gram,  visit  the  department’s  web  page  at revenue.wi.gov/Pages/OnlineServices/corp-partnership-third-party-ven-
dors.aspx. 

If you have an approved electronic filing waiver and must file your return on paper, follow these mailing instructions 
carefully: 
•  Do not fasten, staple, or bind the pages of your return. Use paper clips instead. 
•  If you are submitting multiple returns, separate them with colored separator sheets. 
•  Use the mailing address shown on the form. 

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
Period Covered by Return 

A 2024 Wisconsin return must be filed by a corporation for calendar year 2024 or a fiscal year that begins in 2024. A 
fiscal year may end only on the last day of a month. The period covered by the return can’t exceed 12 months. The 
return must cover the same period as the corporation’s federal income tax return.  

Example:  Corporation A has a fiscal year beginning March 1, 2024 and ending February 28, 2025.  Corporation A 
files a 2024 Form 4 for the period of March 1, 2024 through February 28, 2025.    
 
Corporations reporting on a 52-53-week period for federal tax purposes must file on the same reporting period for 
Wisconsin. A 52-53-week taxable year is deemed to begin on the first day of the calendar month beginning nearest 
to the first day of the 52-53-week taxable year. The taxable year is deemed to end on the last day of the calendar 
month closest to the last day of the 52-53-week taxable year. 

Any change in accounting period made for federal purposes must also be made for Wisconsin purposes. For the first 
taxable year for which the change applies, file with the Wisconsin return a copy of the IRS’s notice of approval of 
accounting period change if such approval is required or an explanation of the change if the IRS’s approval isn’t 
required. 

Accounting Methods and Elections 

In computing net income, the method of accounting must be the same method used in computing federal net income. 
However, if the method used for federal purposes isn’t authorized under the  Internal Revenue Code in effect for 
Wisconsin, use a method authorized under the Internal Revenue Code in effect for Wisconsin. 

Situations Where Installment Method Not Authorized for Wisconsin.         A corporation, including a tax-option (S) 
corporation, entitled to use the installment method of accounting must take the unreported balance of gain on install-
ment obligations into income in the taxable year of their distribution, transfer, or acquisition by another person or for 
the final taxable year for which it files or is required to file a Wisconsin franchise or income tax return, whichever year 
occurs first. 

Change in Accounting Method. A change in accounting method made for federal purposes must also be made for 
Wisconsin purposes, unless the change isn’t authorized under the Internal Revenue Code in effect for Wisconsin. 
Adjustments required federally as a result of a change made while the corporation is subject to Wisconsin taxation 
must also be made for Wisconsin purposes, except in the last year that a corporation is subject to taxation by Wis-
consin it must take into account all remaining adjustments required. 

For the first taxable year for which the change applies, file with the Wisconsin return either a copy of the application 
for change in accounting method filed with the Internal Revenue Service and copy of the IRS’s consent, if applicable, 
or an explanation of the change if the IRS’s approval isn’t required.  

Elections. As explained above, a corporation can’t make different elections for federal and Wisconsin purposes with 
respect to accounting periods and accounting methods, unless the federal method isn’t permitted under the Internal 
Revenue Code in effect for Wisconsin. In situations where a corporation has an option under the Internal Revenue 
Code and the IRS doesn’t consider that option to be a method of accounting, a different election may be made for 
Wisconsin than for federal purposes. If federal law specifies the manner or time period in which an election must be 
made, those requirements also apply for Wisconsin purposes. See page 8 of Wisconsin Tax Bulletin 214 for additional 
information. 

Payment of Estimated Tax 

If the total of a corporation’s franchise or income tax and economic development surcharge due is $500 or more, it 
generally must make quarterly estimated tax payments. Failure to make required estimated tax payments may result 
in an interest charge.  

Quick Refund. A corporation that overpaid its estimated tax may apply for a refund before filing its tax return if its 
overpayment is (1) at least 10% of the expected Wisconsin tax liability and (2) at least $500. To apply, file Wisconsin 

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
Form 4466W, Corporation Application for Quick Refund of Overpayment of Estimated Tax, after the end of the taxable 
year and before the corporation files its tax return.  

A corporation that has a tax due when filing its tax return as a result of receiving a “quick refund” will be charged 12% 
annual interest on the amount of unpaid tax from the date the refund is issued to the earlier of the 15th day of the 4th 
month (3rd month for fiscal year ending June 30) after the close of the taxable year or the date the tax liability is paid. 
Any tax that remains unpaid after the unextended due date of the tax return continues to be subject to 18% or 12% 
annual interest, as appropriate. 

Electronic Funds Transfer Required. Section Tax 1.12, Wisconsin Administrative Code, requires the payment of 
certain taxes by electronic funds transfer (EFT). A corporation must pay its estimated franchise or income taxes and 
economic development surcharge by EFT if its net tax less refundable credits on its prior year return was $1,000 or 
more. The department will notify a corporation when EFT payments are required. The corporation will have 90 days 
after being notified to register for EFT. The first EFT payment is due on the first tax due date following the end of the 
90-day registration period. 

To make EFT payments of corporation franchise or income tax, choose the appropriate tax type code from the table 
below. When making EFT payments, be sure to enter the last day of your taxable year for which the payment is being 
made, not the last day of the quarterly installment period. 

                    Tax Type                                                 Tax Type Code 
             Corporation estimated tax payment                               02100 

                  Corporation tax due with return                            02200 

          Corporation amended return tax due                                 02400 

  Corporation bill (except audit assessments)                                02540 
 
Corporations not required to pay by EFT may elect to do so. For more information, visit the Department of Revenue’s 
web  site  at revenue.wi.gov/Pages/FAQS/pcs-eft.aspx,  e-mail,  DORBusinessTax@wisconsin.gov,  call  (608)  264-
9918, or write to Electronic Funds Transfer Assistance, Wisconsin Department of Revenue, PO Box 8949, Madison, 
WI 53708-8949. 

If you are not required to use EFT, you may make your estimated payments using Form Corp-ES, Wisconsin Corpo-
ration Estimated Tax Voucher. See the department's     Make a Payment     webpage for information about making pay-
ments.  

Required Disclosures and Attachments 

In addition to filing Form 4 itself, the corporation may be required to disclose certain types of transactions included 
on the return or file information returns. The corporation must also provide a complete copy of the corporation’s 
federal income tax return and other schedules to supplement the return. Each of these requirements is described 
below.  

Disclosure of Related Entity Expenses. If the corporation will be deducting more than $100,000 (after considering 
the effect of apportionment) of interest, rent, management fees, or intangible expenses paid, accrued, or incurred to 
a related person or entity, the corporation must generally file Schedule RT, Wisconsin Related Entity Expenses Dis-
closure Statement, with its franchise or income tax return. The Schedule RT instructions explain the reporting re-
quirements.  

However, even if you are not required to file Schedule RT, if you are taking deductions for interest, rent, management 
fees, or intangible expenses, paid, accrued, or incurred to related entities, you must add those expenses back to 
federal income as a Wisconsin addition modification. To the extent the expenses meet the tests for deductibility, you 
may subtract them out as a subtraction modification. See the Schedule 4V instructions and Schedule 4W instructions 
for details. 

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
Corporation’s Disclosure of Reportable Transactions. If a corporation was required to include any form with its 
federal tax return to disclose a “reportable transaction,” as defined under sec. 71.81(1)(c), Wis. Stats.  it,must file a 
copy of that form with the Department of Revenue within 60 days of the date it is required to file it for federal income 
tax purposes, provided it is otherwise required to file a Wisconsin return. 

This  includes  federal  Form  8886,  Reportable  Transaction  Disclosure  Statement. To  file  this  form  for  Wisconsin 
purposes, check the "yes" box for question 53 on Form 4, and submit the form with your return. 

Material Advisor’s Disclosure of Reportable Transactions.     A material advisor that is required to file a form with 
the IRS to disclose a reportable transaction must file a copy of that form with the Department of Revenue within 60 
days of the date it is required for federal income tax purposes, provided that the form relates to a taxpayer that is 
required to file a Wisconsin franchise or income tax return.  

For federal purposes, the form required for this disclosure is Form 8918, Material Advisor Disclosure Statement. To 
file this form for Wisconsin purposes, send a paper copy, separate from the Wisconsin return to Wisconsin Depart-
ment of Revenue, Tax Shelters Program, PO Box 8906, Madison, WI  53708-8906. Include a listing of the names 
and identification numbers of each Wisconsin taxpayer for whom the advisor provided services to. 

A “material advisor” means any person who provides any material aid, assistance, or advice with respect to organiz-
ing, managing, promoting, selling, implementing, insuring, or carrying out any reportable transaction (as defined in 
the U.S. Treasury Regulations) and who, directly or indirectly, derives gross income from providing such aid, assis-
tance, or advice in an amount that exceeds the threshold amount. See sec. 71.81(1)(e), Wis. Stats., for details of the 
threshold amount that applies. 

 NOTE: For disclosures of related entity expenses, submit Schedule RT with your Wisconsin franchise or income 
 tax return. However, for disclosures of reportable transactions, mail a copy of the federal form,  separate from the 
 return, to the Tax Shelters Program address. 
                                                                                                                           
Uncertain Tax Positions.  If you were required to file federal Schedule UTP-Uncertain Tax Position Statement, 
check the "yes" box on line 52 and include a copy of the schedule with your Wisconsin tax return. 

Information Return for Miscellaneous Income. If the corporation paid $600 or more in rents, royalties, or certain 
nonwage compensation to one or more individuals, the corporation must file an information return to report those 
payments. You may use Wisconsin Form 9b, Miscellaneous Income, or you may use federal Forms 1099 or 1099-
NEC instead of Form 9b. For more information, see the Form 9b instructions. 

Federal Income Tax Return. All corporations filing Form 4 must include a complete copy of their federal income tax 
return, including all supporting schedules that were submitted to the IRS with the federal return.  

Supporting Schedules for Return. The line-by-line instructions of the Wisconsin form you are filing often indicate 
that specific schedules are required to support amounts reported on the return. In some cases, the schedules must 
be on specific department-prescribed forms, and in other cases you must prepare your own schedule. Follow the 
line-by-line instructions carefully.    

Internal Revenue Service Adjustments, Amended Returns, and Claims for Refund 

Internal Revenue Service Adjustments. If a corporation’s federal tax return is adjusted by the IRS and the adjust-
ments affect the Wisconsin net tax payable, the amount of a Wisconsin credit, a Wisconsin net business loss car-
ryforward, or a Wisconsin capital loss carryforward, you must report the adjustments to the Department of Revenue 
within 180 days after they become final by either filing an amended Wisconsin franchise/income tax return or mailing 
a copy of the final federal audit report. 

Send a copy of the final federal audit reports and any associated amended Wisconsin returns to the Wisconsin De-
partment  of  Revenue,  PO  Box  8908,  Madison,  WI  53708-8908.  If  submitting  a  federal  audit  report  without  an 
amended return, mail it to the Audit Bureau, Wisconsin Department of Revenue, Mail Stop 3-107, PO Box 8906, 
Madison, WI 53708-8906. Don’t include these items with the tax return for the current year. 

IC-100 (R. 10-24)                                          12

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
Amended Returns. After you have filed a complete, original tax return, you may file an amended return to correct a 
tax return as you originally filed it or as it was later adjusted by an amended return, a claim for refund, or an office or 
field audit. 

If you file an amended federal return and the changes affect the Wisconsin net tax payable, the amount of a Wisconsin 
credit,  a  Wisconsin  net  business  loss  carryforward,  or  a  Wisconsin  capital  loss  carryforward,  you  must  file  an 
amended Wisconsin return with the Department of Revenue within 180 days after filing the amended federal return. 

To file an amended Wisconsin return, put a check mark on the designated line in item D1 on the front of the return, 
complete the return, and include Schedule AR explaining any changes made. Show computations in detail, including 
any applicable supplemental forms or schedules. Also show how you figured your refund or additional amount owed. 
Where applicable, the line-by-line instructions in these instructions provide specific instructions for how to compute 
the amounts on an amended return. Do not include a copy of the original return. 

File your amended return electronically by using one of the third-party software providers:  

A list of approved software providers is available here: revenue.wi.gov/Pages/OnlineServices/corp-partnership-third-
party-vendors.aspx 
 
If you have an approved electronic filing waiver, send amended returns to the Wisconsin Department of Revenue, 
PO Box 8908, Madison, WI 53708-8908. Don’t include amended returns with other tax returns that you are 
filing. 

Claims for Refund. A claim for refund must be filed within 4 years of the unextended due date of the return. However, 
a claim for refund to recover all or part of any tax or credit paid because of an office or field audit must be filed within 
4 years after such an assessment. That assessment must have been paid and must not have been protested by filing 
a petition for redetermination. See sec. Tax 2.12, Wisconsin Administrative Code, for more information on claims for 
refund and other amended returns. 

Final Return 

If the corporation liquidated during the taxable year, put a check mark on the designated line in item D3 on the front 
of the return. Enter the date of liquidation as the taxable year ending date at the top of the return. Submit a copy of 
your plan of liquidation and a copy of federal Form 966 with your Wisconsin return. Note: checking this box will not 
close all your accounts with the department; only the corporation account will close. 
 
Generally, the final return is due on or before the federal due date. In most cases, this is the 15th day of the 4th month 
(3rd month for June 30 year-end) after the date the corporation dissolved. The tax is payable by the 15th day of the 
4th month (3rd month for June 30 year-end) after the date of dissolution, regardless of the due date of the final return. 

Penalties for Not Filing or Filing Incorrect Returns 

If you don’t file a franchise or income tax return that you are required to file, or if you file an incorrect return due to 
negligence or fraud, interest and penalties may be assessed against you. The interest rate on delinquent taxes is 
18% per year. Civil penalties may be as much as 100% of the amount of tax not reported on the return. Criminal 
penalties for filing a false return include a fine of up to $10,000 and imprisonment.  

Further, if you fail to disclose reportable transactions, you may be subject to the penalties described in sec. 71.81, 
Wis. Stats., including a $30,000 penalty for failure to disclose a listed transaction. 

Conformity with Internal Revenue Code and Exceptions

The Wisconsin income and franchise tax law is based on the federal Internal Revenue Code (IRC). The IRC generally 
applies for Wisconsin purposes at the same time as for federal purposes.  For taxable years beginning on or after 
January 1, 2024, Wisconsin's definition of the IRC is the IRC as of December 31, 2022, with exceptions. Below is a 
listing of the exceptions. 

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

NOTE: The exceptions and provisions adopted by Wisconsin listed below are those in effect as of the publication
date of these instructions. It is possible that subsequent changes in Wisconsin law may add or eliminate some
exceptions applicable to taxable years beginning in 2024.

Provisions of the Internal Revenue Code Adopted by Wisconsin:

Changes made by the following public laws apply for Wisconsin purposes for taxable years beginning after
December 31, 2010:

• Section 1201 of P.L. 108-173, relating to health savings accounts.
• Section 307 of P.L. 109-432, relating to the exclusion from gross income of a one-time distribution from
individual retirement accounts to fund health savings accounts.

Changes made by the following public laws apply for Wisconsin purposes for taxable years beginning after
December 31, 2022:

• Sections 5001, 5002, 5005, 9623, 9624, and 9672 of P.L. 117-2
o Section 5001, relating to the addition of certain nonprofit entities and internet publishing organizations to
the list of eligible entities to receive a paycheck protection program loan.
o Section 5002, relating to additional appropriations for targeted economic injury disaster loan advances.
o Section 5005, relating to additional appropriations for shuttered venue operator grants and a reduction in
the amount of a paycheck protection program loans received.
o Section 9623, relating to allowing a married individual who files as married filing separate and lives apart
from their spouse for the last 6 months of the year or has a divorce or separation instrument with the other
spouse by the end of the tax year to claim the earned income credit.
o Section 9624, relating to permanently raising the investment income limit to $10,000, and allowing
adjustments for inflation in subsequent years for purposes of claiming the earned income credit.
o Section 9672, relating to targeted economic injury disaster loan advances received under sec. 331 of
Division N of P.L. 116-260 not being included in gross income, allowing deductions, not reducing tax
attributes, and allowing a basis increase. For partnerships and S corporations, any amount forgiven are
treated as tax-exempt for purposes of sec. 705 and 1366, IRC.

• Section 2 of P.L. 117-6, relating to the extension of paycheck protection program loan funding to June 30,
2021.
• The following sections of Division H of P.L. 117-58:
o Section 80401, relating to the addition of qualified broadband projects to the list of federally exempt facility
bonds.
o Section 80402, relating to the addition of qualified carbon dioxide capture facilities to the list of federally
exempt facility bonds.
o Section 80601, relating to including certain contributions received by a regulated public utility which
provides water or sewerage disposal services in the definition of a "contribution to the capital of the
taxpayer" for purposes of excluding the contribution from gross income of a corporation.

Provisions of the Internal Revenue Code Not Adopted by Wisconsin:

• Sections 1, 3, 4, and 5 of P.L. 106-519, which repealed foreign sales corporation provisions and replaced with
extraterritorial income provisions.
• Sections 101, 102, and 422 of P.L. 108-357, which repealed the exclusion for extraterritorial income, domestic
production activities deduction, and the creation of sec. 965 – incentives to reinvest foreign earnings in the U.S.
• Sections 1310 and 1351 of P.L. 109-58, which provides for the modification to special rules for nuclear decom-
missioning costs, repeal of the limitation on contract research expenses paid so small businesses, universities,
and federal laboratories.
• Section 11146 of P.L. 109-59, the tax treatment of state ownership of railroad real estate investment trust.

IC-100 (R. 10-24) 14

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

• Section 403(q) of P.L. 109-135, which provides incentives to reinvest foreign earnings from controlled foreign
corporations in the U.S.
• Section 513 of P.L.109-222, which repeals foreign sales corporation/extraterritorial income exclusion binding
contract relief.
• Section 104 of P.L. 109-432, which increases the rates of the alternative incremental credit and provides a new
alternative simplified credit.
• Sections 8233 and 8235 of P.L. 110-28, which created a special rule for banks required to change from the
reserve method of accounting in becoming tax-option (S) corporations and the elimination of all earnings and
profits attributable to pre-1983 years.
• Section 11(e) and (g) of P.L. 110-172, which provides clerical amendments to research credits for controlled
corporations and common control, and clerical amendments to the FSC Repeal and Extraterritorial Income Ex-
clusion Act of 2000.
• Section 301 of P.L. 110-245, which provides for tax responsibilities of expatriation.
• Section 15351 of P.L. 110-246, limits the amount of farm losses that may offset non-farming business income to
$300,000.
• Section 302 of division A, section 401 of division B, and sections 312, 322, 502(c), 707, and 801 of division C of
P.L. 110-343, which limits executive compensation for employers participating in troubled assets relief program
for the taxable year in which the troubled assets exceed $300,000,000. Caps the domestic production activities
deduction at 6% for oil-related activities. The deduction for income attributable to domestic production activities
in Puerto Rico applies to the first 8 taxable years beginning before January 1, 2010. Tax incentives for investment
in the District of Columbia includes exclusion for gain on sale of an asset held from more than 5 years. Defines
wages for purposes of the domestic production activities deduction. Creates sec. 198A to provide for expensing
of disaster expenses for control of hazardous substances. Specifies treatment of nonqualified deferred compen-
sation plans maintained by foreign corporations.
• Sections 1232, 1251, 1501, and 1502 of division B of P.L. 111-5, which suspends the special rules for original
issue discount on high yield obligations issued during the period 9/1/2008 and 12/31/2009. Provides that no built-
in-gain tax is imposed on a tax-option (S) Corporation for a taxable year beginning in 2009 and 2010 if the seventh
taxable year in the corporation's recognition period preceded such taxable year. Tax-exempt obligations held by
financial institutions, in an amount not to exceed 2 percent of the adjusted basis of the financial institution's
assets, are not taken into account for determining the portion of the financial institutions interest expense subject
to the pro rata interest disallowance rule of sec. 265(b). Modification of the small insurer exception to tax-exempt
interest expense allocation rules for financial institutions.
• Sections 211, 212, 213, 214, and 216 of P.L. 111-226, which adopts a matching rule to prevent the separation of
foreign taxes from the associated foreign income, denies a foreign tax credit for the disqualified portion of any
foreign income tax paid in connection with a covered asset acquisition, provides a separate application of foreign
tax credit limitation to items resourced under treaties, limits the amount of foreign taxes deemed paid with respect
to sec. 956 inclusions, treats a foreign corporation as a member of an affiliated group for interest allocation and
apportionment purposes in more than 50% of gross income is effectively connected income and at least 80% of
either the vote or value of all outstanding stock is owned directly or indirectly by members of the affiliated group.
• Section 2122 of P.L. 111-240, which clarifies the income sourcing rules for guaranteed fees.
• Sections 754 and 760 of P.L. 111-312, which specifies certain tax incentives for investments in the District of
Columbia and specifies that gross income does not include gain on certain small business stock.
•
• Sections 104, 318, 322, 323, 326, 327, and 411 of P.L. 112-240, which makes the alternative minimum tax
exemption permanent and indexed for inflation, extends through 2013 the deduction with respect to income at-
tributable to domestic production activities in Puerto Rico, extends the subpart F exception for active financing
income, extends the look-thru treatment of payments between related controlled foreign corporations under for-
eign personal holding company, extends through 2013 the reduction in tax-option (S) Corporation built-in gains
tax and clarifies treatment of installment sales, provides a 60% exclusion for gain on small business stock ac-
quired before 2019, and extends through 2013 the rules that allow gain certain sales of electric transmission
property to be recognized ratably over 8 taxable years.
• Public Law. 114-7, relating to contributions for relief of slain New York Police Detectives.
• Section 1101 of P.L. 114-74 relating to partnership rules.
• Section 305 of division P of P.L. 114-113, relating to the transportation costs of independent refiners.

IC-100 (R. 10-24) 15

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

• Sections 123, 125-128, 143, 144, 151-153, 165-167, 169-171, 189, 191, 326, and 411 of division Q of P.L. 114-
113:
o Section 123, relating to extension of 15-year straight-line cost recovery for qualified leasehold improve-
ments, qualified restaurant buildings and improvements, and qualified retail improvements.
o Section 125, relating to the extension of treatment of certain dividends of regulated investment compa-
nies.
o Section 126, relating to the extension of exclusion of 100 percent of gain on certain small business stock.
o Section 127, relating to the extension of reduction in S-corporation recognition period for built-in gains
tax.
o Section 128, relating to the extension of subpart F exception for active financing income.
o Section 143, relating to the extension and modification of bonus depreciation.
o Section 144, relating to the extension of look-thru treatment of payments between related controlled
foreign corporations under foreign personal holding company rules.
o Section 151, relating to the extension and modification of exclusion from gross income of discharge of
qualified principal residence indebtedness.
o Section 152, relating to the extension of mortgage insurance premiums treated as qualified residence
interest.
o Section 153, relating to the extension of above-the-line deduction for qualified tuition and related ex-
penses.
o Section 165, relating to the extension of classification of certain race horses as 3-year property.
o Section 166, relating to the extension of 7-year recovery period for motorsports entertainment complexes.
o Section 167, relating to the extension and modification of accelerated depreciation for business property
on an Indian reservation.
o Section 169, relating to the extension of special expensing rules for certain film and television produc-
tions; special expensing for live theatrical productions.
o Section 170, relating to the extension of deduction allowable with respect to income attributable to do-
mestic production activities in Puerto Rico.
o Section 171, relating to the extension and modification of empowerment zone tax incentives.
o Section 189, relating to the extension of special allowance for second generation biofuel plant property.
o Section 191, relating to the extension of special rule for sales or dispositions to implement FERC or State
electric restructuring policy for qualified electric utilities.

o Section 326, relating to the dividends derived from RICs and REITs ineligible for deduction for United
States source portion of dividends from certain foreign corporations.
o Section 411, relating to the partnership audit rules.

• Sections 11011, 11012, 13201 (a) to (e) and (g), 13206, 13221, 13301, 13304 (a), (b), and (d), 13531, 13601,
13801, 14101, 14102, 14103, 14201, 14202, 14211, 14212, 14213, 14214, 14215, 14221, 14222, 14301, 14302,
14304, and 14401 of P.L. 115−97:
o Section 11011, relating to the 20% deduction for domestic qualified business income.
o Section 11012, relating to the limitation on losses for taxpayers other than corporations.
o Section 13201 (a) to (e) and (g), relating to the temporary 100% expensing for certain business assets
(bonus depreciation).
o Section 13206, relating to the amortization of research and experimental expenditures beginning in 2022.
o Section 13221, relating to special rules for the taxable year of inclusion.
o Section 13301, relating to the 30% taxable income limitation for the deduction of interest.
o Section 13304(a), (b), and (d) relating to the limit on the deduction by employers of fringe benefits (meals,
entertainment, and transportation).
o Section 13531, relating to the limitation on deductions for FDIC premiums.
o Section 13601, relating to the modification of the limitation on excessive employee remuneration.

IC-100 (R. 10-24) 16

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
   o  Section 13801, relating to the production period for beer, wine, and distilled spirits. 
   o  Section 14101, relating to the deduction for the foreign-source portion of dividends received by domestic 
   corporations from specified 10% owned foreign corporations. 
   o  Section 14102, relating to the special rules for sale or transfers involving specified 10% owned foreign 
   corporations. 
   o  Section 14103, relating to the treatment of deferred foreign income upon transition to a participation 
   exemption system of taxation. 
   o  Section 14201, relating to the current year global intangible low-taxed income by U.S. shareholders. 
   o  Section 14202, relating to the deduction for foreign derived intangible income and global intangible low-
   taxed income. 
   o  Section 14211, relating to the elimination of the inclusion of foreign base company oil related income. 
   o  Section 14212, relating to the repeal of the inclusion based on withdrawal of previously excluded subpart 
   F income from qualified investment. 
   o  Section 14213, relating to the modification of stock attribution rules for determining the status as a con-
   trolled foreign corporation. 
   o  Section 14214, relating to the modification of the definition of a U.S. shareholder. 
   o  Section 14215, relating to the elimination of the requirement that a corporation must be controlled for 30 
   days before the subpart F inclusions apply. 
   o  Section 14221, relating to the limitations on income shifting through intangible property transfers. 
   o  Section 14222, relating to certain related party amounts paid or accrued in hybrid transactions or with 
   hybrid entities.  
   o  Section 14301, relating to the repeal of section 902 – indirect foreign tax credits, and determination of 
   the deemed paid credit for subpart F inclusions under sec. 960 on a current year basis. 
   o  Section 14302, relating to the separate foreign tax credit limitation basket for foreign branch income. 
   o  Section 14304, relating to the election to increase the percentage of domestic taxable income offset by 
   the overall domestic loss treated as foreign source. 
   o  Section 14401, relating to the base erosion anti-abuse tax. 
•  Sections 40304, 40305, 40306, and 40412 of P.L. 115-123: 
  o  Section 40304, relating to the extension of classification of certain race horses as 3-year property. 
  o  Section 40305, relating to the extension of 7-year recovery period for motor-sports entertainment complexes. 
  o  Section  40306,  relating  to  the  extension  of  accelerated  depreciation  for  business  property  on  an  Indian 
   reservation. 
  o  Section 40412, relating to the extension of special allowance for second generation biofuel plant property. 
• Section 101 (c) of division T of P.L. 115-141, relating to the application of section 199 to certain qualified pay-
  ments paid after 2017 for payments received by a patron from a specified agricultural or horticultural cooperative 
  for qualified production activities income.  
• Sections 101 (d) and (e), 102, 201 to 207, 301, 302, and 401 (a) (47) and (195), (b) (13), (17), (22) and (30), 
  and (d) (1) (D) (v), (vi), and (xiii) and (xvii) (II) of division U of P.L. 115-141: 
  o  Sections 101 (d) and (e) and 102, relating to technical corrections to bonus depreciation, alternative minimum 
   tax requirements for qualified Indian reservation property, and qualified production activities income made by 
   the Protecting Americans from Tax Hikes Act of 2015 and the Consolidated Appropriations Act, 2016. 
  o  Sections 201 to 207 relating to partnership audit rules. 
  o  Sections 301 and 302, relating to amendments to regulatory requirements for partnership returns and the 
   definition of qualified small power production facilities made by the Bipartisan Budget Act of 2015 and the 
   Energy Policy Act of 2005. 
  o  Section 401 (a) (47) and (195), (b) (13), (17), (22) and (30), and (d) (1) (D) (v), (vi), and (xiii) and (xvii) (II), 
   relating to clerical corrections and deadwood-related provisions to the following: exempt facility bonds, tax-
   exempt  enterprise  zone  facility  bonds,  the  special  allowance  for  qualified  disaster  assistance  property, 
   reducing the dividends received deduction where portfolio stock is debt financed, exemption from tax on 
   corporations,  certain  trusts,  etc.,  requirements  of  domestic  international  sales  corporations,  dividends 
   received by corporations, rules applied to deductions for dividends received,  the foreign tax credit, and 
   dividends received by corporations.  

IC-100 (R. 10-24)                              17

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

• Sections 104, 114, 115, 116, 130, and 145 of division Q of P.L. 116-94.
o Section 104, relating to the deduction of qualified tuition and related expenses.
o Section 114, relating to the classification of certain race horses as 3-year property.
o Section 115, relating to the 7-year recovery period for motorsports entertainment complexes.
o Section 116, relating to the accelerated depreciation for business property on Indian reservations.
o Section 130, relating to special allowance for second generation biofuel plant property.
o Section 145, relating to look-thru rule for related controlled foreign corporations.
• Sections 2304 and 2306 of P.L. 116-136:
o Section 2304, relating to the modification of limitations on losses for taxpayers other than corporations.
o Section 2306, relating to the modifications of limitation on business interest.
• Sections 111, 114, 115, 116, 118 (a) and (d), 133, 137, 138, and 210 of division EE of P.L. 116-260.
o Section 111, relating to the look-thru rule for related controlled foreign corporations.
o Section 114, relating to the exclusion from gross income of discharge of qualified principal residence
indebtedness.
o Section 115, relating to the 7-year recovery period for motorsports entertainment complexes.
o Section 116, relating to the expensing rules for certain productions.
o Section 118 (a) and (d), relating to empowerment zone tax incentives.
o Section 133, relating to the treatment of mortgage insurance premiums as qualified residence interest.
o Section 137, relating to the classification of certain race horses as 3-year property.
o Section 138, relating to the accelerated depreciation for business property on Indian reservations.
o Section 210, relating to temporary allowance of full deduction for business meals.
• Sections 5003, 9041, 9673, 9675, and 9708 of P.L. 117-2.
o Section 5003, relating to additional restaurant revitalization grant funds.
o Section 9041, relating to the excess business loss limitation extension for noncorporate taxpayers to
December 31, 2026
o Section 9673, relating to restaurant revitalization grants not being included in gross income and deductions
allowed.
o Section 9675, relating to the exclusion from income for most student loans discharged after December 31,
2020, and before January 1, 2026.
o Section 9708, relating to the expanded definition of "covered employee" for publicly held corporations
deducting excessive employee remuneration.
• Section 13903(b) of P.L. 117-169, relating to the extension of the excess business loss limitation for noncorporate
taxpayers through December 31, 2028.

Other Exceptions to Internal Revenue Code

The following federal provisions in effect as of December 31, 2022, are specifically excluded for Wisconsin franchise
and income tax purposes:

Depreciation and Bonus Depreciation

For taxable years beginning on or after January 1, 2014, for purposes of computing depreciation, depletion, and
amortization, the Internal Revenue Code means the federal Internal Revenue Code in effect on January 1, 2014.

The provision that property required to be depreciated for taxable year 1986 under the Internal Revenue Code as
amended to December 31, 1980, to continue to be depreciated under the Internal Revenue Code as amended to
December 31, 1980, is limited to taxable years beginning before January 1, 2014.
Bonus Depreciation

IC-100 (R. 10-24) 18

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

Wisconsin has not adopted federal bonus depreciation provisions .For Wisconsin purposes, depreciation, depletion,
and amortization is computed based on the Internal Revenue Code in effect on January 1, 2014. Bonus depreciation
was not in effect on January 1, 2014.

Section 179 Expense

For taxable years beginning on or after January 1, 2014, sections 179, 179A, 179B, 179C, 179D, and 179E of the
Internal Revenue Code, related to expensing of depreciable business assets, apply for Wisconsin tax purposes.
"Internal Revenue Code" means the federal Internal Revenue Code in effect for the year in which the property is
placed in service.

Capital Losses
Wisconsin generally follows the capital loss limitations and carryovers provided under the IRC for corporations. If a
corporation has a net capital loss, the loss must be carried to other taxable years and deducted from capital gains in
those years, as provided in sec. 1212, IRC. However, for Wisconsin purposes, a corporation can’t carry back a loss
to taxable years before 1987. Losses that can’t be carried back may be carried forward 5 years.

Limitations on Certain Federal Deductions

You may have to recompute federal deduction limitations for Wisconsin purposes if the amount of your federal taxable
income for federal purposes differs from your federal taxable income as determined under the Internal Revenue Code
in effect for Wisconsin. Differences in your federal taxable income for federal and Wisconsin purposes may arise for
the following reasons:
• A provision of the federal Internal Revenue Code is excluded from the definition of “Internal Revenue Code” in
effect for Wisconsin under sec. 71.22(4), Wis. Stats.
• Different elections under the Internal Revenue Code are made for federal and Wisconsin purposes
The deduction limitations are applied in computing federal taxable income before the Wisconsin modifications pre-
scribed in secs. 71.26(2) and (3) and 71.30, Wis. Stats. Therefore, you may not recompute deduction limitations as
a result of making Wisconsin modifications.
The following examples further illustrate how the limitations on federal deductions apply in the case of section 179
expense:
Example 1: Corporation B reports federal taxable income of zero for the current taxable year and Wisconsin taxable
income of $20,000. The difference results from adding to federal income the $20,000 of state income taxes paid that
the taxpayer had deducted on its federal return. For federal purposes, the taxpayer has $25,000 of section 179
expense, but is limited by its business income to claiming a deduction of $5,000 and carrying forward the $20,000
balance.

For Wisconsin purposes, the section 179 deduction is limited to $5,000, the federal amount. The Wisconsin sec-
tion 179 deduction cannot be recomputed since the addback for state income taxes is a modification prescribed in
sec. 71.26(3)(g), Wis. Stats.

Example 2: Corporation F claims no section 179 expense deduction but $16,000 of bonus depreciation on its federal
return for the current taxable year. The taxpayer could have elected to claim a section 179 expense deduction on its
federal return in addition to or instead of the bonus depreciation. The taxpayer may elect to claim the $16,000 as a
section 179 expense deduction on its Wisconsin return so that the computation of its regular MACRS allowance is
the same for federal and Wisconsin purposes.

Differences Between Federal and Wisconsin Basis of Assets

Assets of Previously Nontaxable Corporations. For the first year a corporation is taxable in Wisconsin, the basis
of its assets is its federal basis.

General Instructions for Apportionment

IC-100 (R. 10-24) 19

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
Who Must Use Apportionment 

A corporation engaged in a unitary business in and outside Wisconsin must report a portion of its total net income to 
Wisconsin using the apportionment method, unless the department gives permission to use separate accounting.  

To use the apportionment method, a corporation must have business activity sufficient to create nexus in Wisconsin 
and at least one other state or foreign country. “Nexus” means that a corporation’s business activity is of such a 
degree that the state or foreign country has jurisdiction to impose an income tax or franchise tax measured by net 
income.  

Wisconsin’s Administrative Code provides more detailed information about when apportionment is required. The fol-
lowing sections may be helpful: 
•  Section Tax 2.39, Apportionment Method 
•  Section Tax 2.62, Unitary Business 
•  Section Tax 2.82, Nexus 

Apportionment Method 

Under the apportionment method, a corporation shows all its income and deductions attributable to the unitary busi-
ness and assigns a part to Wisconsin according to an apportionment percentage.  

For most corporations required to use apportionment, the apportionment factor numerator is Wisconsin sales, and 
the denominator is total company sales. This is known as the “single sales factor” method. Corporations that use the 
single sales factor method use Part I of Schedule A-01, Wisconsin Single Sales Factor Apportionment Data for Non-
specialized Industries, to compute their apportionment percentage. 

However, certain specialized industries do not use the single sales factor method. Instead, they apportion their in-
comes under provisions of the Wisconsin Administrative Code, or in the case of insurance companies, under a sep-
arate subchapter of the Wisconsin Statutes. Companies that don’t use the single sales factor include: 
•  Direct air carriers  
•  Interstate air freight forwarders affiliated with a direct air carrier 
•  Motor carriers  
•  Railroads  
•  Pipeline companies  
•  Financial  organizations,  including  financial  institutions,  brokers-dealers,  investment  advisers,  investment 
  companies, and underwriters  
•  Telecommunications companies  
•  Insurance companies  

Among these specialized industries, financial organizations and insurance companies have single-factor formulas 
that are similar to the single sales factor. Financial organizations use a receipts factor, and insurance companies use 
a premiums factor.  

The apportionment schedules consist of the following: 
 
• Schedule A-02, Wisconsin Apportionment Percentage for Interstate Financial Institutions,  
• Schedule A-03, Wisconsin Apportionment Percentage for Interstate Motor Carriers,  
• Schedule A-04, Wisconsin Apportionment Percentage for Interstate Telecommunications Companies,  
• Schedule A-05, Wisconsin Premiums Factor for Insurance Companies,  
• Schedule A-06, Wisconsin Receipts Factor for Interstate Brokers-Dealers, Investment Advisors, Investment Com-
  panies, and Underwriters,  

IC-100 (R. 10-24)                                       20

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

• Schedule A-07, Wisconsin Apportionment Percentage for Interstate Air Carriers,
• Schedule A-08, Wisconsin Apportionment Percentage for Broadcasters,
• Schedule A-09, Wisconsin Apportionment Percentage for Interstate Railroads,
• Schedule A-10, Wisconsin Apportionment Percentage for Interstate Pipeline Companies, or
• Schedule A-11, Wisconsin Apportionment Percentage for Interstate Air Freight Forwarders Affiliated with a Direct
Air Carrier

Nonapportionable Income

A corporation that is required to use apportionment may have nonapportionable income. Nonapportionable income
is income which is allocable directly to a particular state. It includes income or loss derived from the sale of nonbusi-
ness real or tangible personal property or from rentals and royalties from nonbusiness real or tangible personal prop-
erty. This income is assigned to the state where the property is located.

Nonapportionable income also includes income that is realized from the sale of or purchase and subsequent sale or
redemption of lottery prizes if the winning tickets were originally bought in Wisconsin.

CAUTION: Intangible income of a personal holding company is apportionable unless it qualifies as
nonapportionable income under the same standard that applies to other corporations.

Total nonapportionable income (or loss) is removed from net income before the apportionment percentage is applied.
The amount allocable to Wisconsin is then combined with the Wisconsin share of apportionable income to arrive at
Wisconsin net income. If a corporation has nonapportionable income, it must report that income on Form N, Wiscon-
sin Nonapportionable, Separately Accounted, and Separately Apportioned Income.

Separately Apportioned Income

If the corporation has separately apportioned income, the corporation would complete Form N to report the separately
apportioned income. See the Form N instructions for details.

Corporate Partners or LLC Members

A corporation that is a general or limited partner of a partnership must include its share of the numerator and denom-
inator of the partnership’s apportionment factors in its own apportionment factors. A corporation that is a member of
a limited liability company (LLC) treated as a partnership for federal tax purposes must include its share of the nu-
merator and denominator of the LLC’s apportionment factors in its own apportionment factors.

NOTE: A corporation that is a general or limited partner in a partnership or a member of an LLC treated as a
partnership should obtain a detailed breakdown of the partnership’s or LLC’s apportionment factors so the corpo-
ration can include its share of those factors in the computation of its own apportionment factors.

However, income from a partnership or LLC may be nontaxable under the principles of the U.S. Supreme Court
decision in Allied-Signal v. Director, Div. of Taxation, 504 U.S. 768 (1992), if the investment is passive and does not
serve an operational function. In this case, the corporation would not include its share of the partnership’s or LLC’s
apportionment factors in the numerator and denominator of its apportionment factors. Remove this item of income by
completing Form C.

Separate Accounting

A corporation that has income or loss from a business outside Wisconsin that is not part of a unitary business cannot
use apportionment. Instead, it must determine the income attributable to Wisconsin by separate accounting. Under

IC-100 (R. 10-24) 21

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

separate accounting, the corporation must keep separate records of the sales, cost of sales, and expenses for the
Wisconsin business. The corporation uses Form C, Wisconsin Allocation and Separate Accounting Data, to compute
the amount attributable to Wisconsin by separate accounting and uses Form N, Wisconsin Nonapportionable, Sepa-
rately Accounted, and Separately Apportioned Income, to report the separate accounting amount. This is because
the income determined under separate accounting from Form C, line 16 is entered on Form N, line 6.

A unitary business may use separate accounting only with the approval of the department. In the application for
approval, the corporation must explain, in detail, why separate accounting more clearly reflects the corporation’s
Wisconsin income. See the instructions for Form C for how to obtain approval to use separate accounting.

Treatment of Specialized Industries and Entities

Foreign Sales Corporations (FSCs)

FSCs no longer receive special treatment for Wisconsin. The income and tax of FSCs are computed in the same
manner as for other corporations.

Interest Charge Domestic International Sales Corporations (IC-DISCs)

IC-DISCs have no special status for Wisconsin tax purposes. An IC-DISC that is a viable corporation with substance
and has nexus in Wisconsin is taxed like any other corporation. However, if an IC-DISC doesn’t carry on any sub-
stantial business activities and does nothing to earn the income that it reports, its net income is allocated to the
corporation that earned the income.

Insurance Companies

An insurance company may be required to make certain adjustments that are unique to insurance companies. These
adjustments include:
• Adding back loss carryforward deducted in the calculation of federal taxable income and dividend income excluded
from federal taxable income
• Adding back the sec. 847, IRC, deduction, relating to an additional deduction for insurers required to discount
unpaid losses (this deduction isn’t allowed for Wisconsin purposes)
• Subtracting nontaxable income attributable to life insurance operations
• Reducing current year net business loss by the amount of dividends received deduction
• Adjusting net tax liability so that it doesn’t exceed 2% of gross premiums plus 7.9% of income realized from lottery
prizes

All of these adjustments are computed on Wisconsin Schedule 4I, Wisconsin Adjustments for Insurance Companies.
The amounts on Schedule 4I flow through to Schedule 4V, Schedule 4W, or Form 4, as appropriate. See the Schedule
4I instructions for details.

If an insurance company is a small company as defined in sec. 831(b)(2), IRC, the company may elect to be taxed
on taxable investment income as provided in sec. 831(b), IRC, rather than on net income.

Personal Holding Companies

Personal holding companies no longer receive special treatment for Wisconsin. The intangible income of a personal
holding company is apportionable income unless it qualifies as nonapportionable income under the same standard
that applies to corporations that aren’t personal holding companies.

IC-100 (R. 10-24) 22

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

RICs, REMICs, REITs, and FASITs

Depreciation Differences. For RICs, REMICs, or REITs, the following depreciation differences apply:
• Depreciation and amortization on property located outside Wisconsin and placed in service on or after January 1,
1983, and before January 1, 1987, were to be determined under the December 31, 1980, IRC. However, the
Wisconsin Tax Appeals Commission declared this provision unconstitutional in Beatrice Cheese, Inc. vs. Wiscon-
sin Department of Revenue (February 24, 1993). Corporations have the option of either claiming the same depre-
ciation deduction as for federal purposes or continuing their present method of depreciation.
• Section 168(f)(8), IRC, relating to a special rule for leases (safe harbor), didn’t apply for Wisconsin purposes.
• Depreciation for residential real property and property used in farming (if the corporation’s Wisconsin gross farm
receipts or sales exceeded $155,000 for the 1986 taxable year), acquired in the 1986 taxable year, but before
January 1, 1987, must be determined under the December 31, 1980, IRC.

Other Federal-Wisconsin Adjustments. The only adjustments that RICs, REMICs, qualified REITs, and FASITs
must make to federal taxable income to arrive at Wisconsin net income are:
• Those necessary to account for the depreciation and amortization differences described above,
• Any difference in the Wisconsin and federal basis of any asset disposed of in a taxable transaction, and
• Any other adjustment needed for changes made to the Internal Revenue Code that don’t apply for Wisconsin.

None of the other adjustments listed on Schedules 4V or 4W apply to RICs, REMICs, qualified REITs, and FASITs.

Wholly-Owned REIT Subsidiaries. If a wholly-owned REIT subsidiary isn’t treated as a separate entity under sec.
856(i), IRC, and all of its assets, liabilities, and items of income and loss are treated as attributes of the REIT, that
same treatment applies for Wisconsin purposes.

FASITs. The special rules for financial asset securitization investment trusts (FASITs) generally do not apply after
2004.

Tax Exempt Organizations

If a tax-exempt organization is a corporation and has unrelated business income of at least $1,000 as defined in sec.
512, IRC, it must file Form 4T, Wisconsin Exempt Organization Business Franchise or Income Tax Return.

Urban Transit Companies

Certain urban transit companies are subject to a special tax under sec. 71.39, Wis. Stats. Contact the department for
further information.

Line-by-Line Instructions for Form 4

You must complete pages 1, 2, and 3 of Form 4 and the appropriate schedules referenced on Form 4. Do not enter
“See attached” instead of completing the entry spaces. If more space is needed, submit separate sheets using the
same size and format as the printed forms.

Round cents to the nearest whole dollar by eliminating amounts less than 50 cents and increasing amounts from 50
cents through 99 cents to the next higher dollar.

NOTE: These instructions are for separate returns only. Corporations that are in combined groups should see the
Form 6 Instructions for Combined Returns.

IC-100 (R. 10-24) 23

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
 CAUTION: Federal line numbers referred to on Form 4 and in these instructions may change due to IRS form 
 changes occurring after finalization of the Form 4 and instructions. 
                                                                                                                            
■ Header Information – Before completing items A through J, fill in the corporation’s 2024 taxable year at the top of 
the form if filing a fiscal-year or short period return, and enter the corporation’s name and address. The name and 
address information should be written on single lines.  Do not stack the information on the lines. If more room is 
needed, abbreviate where possible.   

Do not write "None" on the amount lines if there is not an entry for the lines.  Instead, leave the lines blank.   

If the corporation dissolved, enter the date of dissolution as the ending date of the 2024 taxable year.  

■ Item A. Federal Employer Identification Number –   Enter the corporation’s federal employer identification number 
(FEIN). If you haven’t yet applied for a FEIN, you may do so by filing federal Form SS-4 with the IRS, calling the IRS’s 
toll-free number (800) 829-4933, or applying online at irs.gov. 

■ Item B. Business Activity (NAICS) Code –   Enter the corporation’s principal business activity code, based on the 
North American Industry Classification System (NAICS), from your federal return. If your federal return is a consoli-
dated return, go to https://www.census.gov/naics/  to find the NAICS code for your principal business activity. 

■ Item C. State and Year of Incorporation –   Enter the 2-letter postal abbreviation for the state (or name of the 
foreign country) under whose laws the corporation is organized and the year of incorporation. 

■ Item D1. Amended Return – Check here if this is an amended return. Include Schedule AR detailing the changes 
made and include any supporting form or schedule. For example, if you are amending the research credit, submit a 
corrected Schedule R and Schedule AR along with your amended return. 

■ Item D2. First Return – Check here if this is the first year that you are filing a Wisconsin return because the 
corporation wasn’t in existence or didn’t do business in Wisconsin in prior years.  

■ Item D3. Final Return – Check here if the corporation ceased to exist or withdrew from Wisconsin during the year 
and will no longer be filing Form 4. If the corporation liquidated, provide a copy of your plan of liquidation and federal 
Form 966. Note: checking this box will not close all your accounts with the department; only the corporation account 
will close. 

■ Items D4 and D5. Short Period – Check the applicable line if a short period return is being filed due to a change 
in the corporation’s accounting period or a stock purchase or sale. 

■ Item E. Federal Extended Due Date –   Check here if the corporation has an extension of time to file its Wisconsin 
return, and enter the federal extended due date. 

 NOTE: Be sure to use the correct year's tax return when filing for a short period.  If the tax returns are not yet 
 available, wait until the returns become available and file under extension.  For example, if a taxpayer has a short 
 period from January 1, 2025 through March 31, 2025, the 2025 Form 4 will not be ready by July 15, 2025 (unex-
 tended due date for a March 31 year-end).  Wisconsin law provides for an automatic 7-month extension to file the 
 return, so filing under extension will allow the correct years return to be filed when the 2024 Form 4 is available 
 (typically the middle of November 2025).  Note that an extension does not extend the time to pay a balance due.  
 To avoid interest charges, pay the amount due by the unextended due date. 

Disaster Relief Extension. If you are filing under extension because of a federal or state disaster, include a state-
ment indicating which disaster extension you are using and attach it to your return. Additional information on disaster 
areas can be found here:  revenue.wi.gov/Pages/FAQS/pcs-extensn.aspx 
 
IC-100 (R. 10-24)                                      24

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
■ Item F. No Business Transacted in Wisconsin – If the corporation was incorporated under Wisconsin law or 
licensed to do business in Wisconsin but had no property or activity in Wisconsin for the taxable year, check here 
and provide a complete copy of the corporation’s federal return.  

■ Item G. Schedule RT Required – Check here if the corporation is filing Schedule RT with its return. Schedule RT 
is generally required if the corporation is claiming a deduction for more than $100,000 of certain expenses paid, 
accrued, or incurred to a related person or entity in the taxable year. The $100,000 threshold amount is determined 
after accounting for the apportionment percentage. 

The types of expenses to which Schedule RT applies, if paid, accrued, or incurred to a related person or entity, are: 
•  Interest expenses, 
•  Rent expenses, 
•  Management fees, and 
•  Intangible expenses. 

See the Schedule RT instructions for details.  

 CAUTION:  Regardless  of  whether  you  are  required  to  file  Schedule  RT,  you  should  be  making  an  addition 
 modification on Schedule 4V for interest, rent, management fees, or intangible expenses paid, accrued, or incurred 
 to  a  related  entity.  Then,  if  the  expenses  meet  the  statutory  tests  required  to  be  deductible,  you  may  make  a 
 subtraction modification on Schedule 4W. See the instructions to Schedules 4V and 4W for details.  
                                                                                                                                   
■ Item H. Insurance Company Indicator – Check here if the corporation is an insurance company. 

■ Item I. Internal Revenue Service Adjustments – If a corporation’s federal tax return is adjusted by the IRS and 
the adjustments affect the Wisconsin net tax payable, the amount of a Wisconsin credit, a Wisconsin net business 
loss carryforward, or a Wisconsin capital loss carryforward, you must report the adjustments to the Department of 
Revenue within 180 days after they become final. 

■ Item J. Federal Consolidated Return – Enter the information requested.  

File your amended return electronically by using one of the third-party software providers:  
revenue.wi.gov/Pages/OnlineServices/corp-partnership-third-party-vendors.aspx 

If you have an approved electronic filing waiver, send a copy of the final federal audit reports and any associated 
amended Wisconsin returns to the Wisconsin Department of Revenue, PO Box 8908, Madison, WI 53708-8908.  

If submitting a federal audit report without an amended return, mail it to the Audit Bureau, Wisconsin Department of 
Revenue, Mail Stop 3-107, PO Box 8906, Madison, WI 53708-8906. Don’t include these items with the tax return for 
the current year. 

■ Line 1. Federal Taxable Income – Enter the federal taxable income before the net operating loss deduction and 
special deductions. Generally, this is the amount from federal Form 1120, line 28. However, for certain types of 
corporations the applicable line of the federal return may be different. These certain types of corporations and appli-
cable lines include the following: 
•  Insurance companies generally use total federal taxable income from lines 1 and 2 of Form 1120-PC 
•  Regulated investment companies (RICs) use Form 1120-RIC, line 26 
•  Real estate mortgage investment conduits (REMICs) use Form 1066, Schedule J, line 4 plus line 9 
•  Real estate investment trusts (REITs) use Form 1120-REIT, line 23 
•  For corporations that are treated as S corporations federally but are not treated as Wisconsin tax-option corpora-
 tions, use Form 1120-S, line 22 
•  Cooperative associations use Form 1120-C, line 25c 

IC-100 (R. 10-24)                                     25

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

■ Line 2. Wisconsin Additions – This is where you make addition adjustments to the amount you entered on line 1
to account for differences between taxable income under Wisconsin law and under federal law. Compute your addi-
tion modifications on Schedule 4V. See the Schedule 4V instructions for details.

■ Line 4. Wisconsin Subtractions – This is where you make subtraction adjustments to the amount you entered on
line 1 to account for differences between taxable income under Wisconsin law and under federal law. Compute your
subtraction modifications on Schedule 4W. See the Schedule 4W instructions for details.

NOTE: If you have any dividends that qualify for the Wisconsin dividends received deduction, use Schedule 4Y to
compute your subtraction modification for dividends, and enter the total on Schedule 4W, line 1.

■ Line 6. Total Nonapportionable and Separately Apportioned Income – Complete this line only if you have
nonapportionable income or are using the separate accounting method. This is the total amount of taxable income
under Wisconsin law that is not eligible for apportionment. This amount comes from line 8 of Form N. If you are
using separate accounting, you will include the amounts you computed on Form C onto Form N . See the
Form N instructions for details.

If any of the amount on line 6 is allocable to Wisconsin, you will enter the Wisconsin amount later, on line 10.

■ Line 8. Wisconsin Apportionment Percentage – If you are using the apportionment method, complete Wisconsin
Schedule A-01, A-02, A-03, A-04, A-05, A-06, A-07, A-08, A-09, A-10, or A-11, as applicable, and enter the appor-
tionment percentage. Fill all spaces to the right of the decimal point. Round to the nearest ten-thousandths of a
percent (for example, 12.3456%).

If this return is for an insurance company that does business only in Wisconsin, enter “100.0000%” on line 8.

■ Line 10. Wisconsin Nonapportionable and Separately Apportioned Income – Complete this line only if you
have nonapportionable income or are using the separate accounting method. If any of the amount you entered on
line 6 is allocable to Wisconsin, enter the Wisconsin amount on line 10. This amount is computed on Form N, line 14.

■ Line 12. Loss Adjustment for Insurance Companies – Complete this line only if the corporation is an insurance
company and the amount on line 11 is a loss. This is where insurance companies adjust their current year net
business loss so that the carryforward to next year is computed without regard to the dividends received deduction,
as required under sec. 71.45(4), Wis. Stats. Compute this amount in Part III of Schedule 4I. See the Schedule 4I
instructions for details.

■ Line 14. Wisconsin Net Business Loss Carryforward – Enter the total Wisconsin net business loss carryforward
from Form 4BL, line 30, column f, but do not enter more than line 13 of Form 4. However, you may choose to use
less than the total allowable net business loss carryforward, if you do, enter that amount on line 13 of Form 4.. See
the Tax Releases in Wisconsin Tax Bulletin issues 138 (April 2004) and 139 (July 2004) for more details on using
carryforwards of net business losses and credits. You may access the Wisconsin Tax Bulletin on the department’s
web site at revenue.wi.gov/Pages/ISE/wtb-Home.aspx.

CAUTION: If line 13 is zero or a loss, do not fill in line 14. If the net business loss carryforward from Form 4BL
exceeds the income reported on line 13, do not enter more than the amount on line 13.

Regulated investment companies, real estate mortgage investment conduits, real estate investment trusts, and fi-
nancial asset securitization investment trusts enter zero on line 14.

■ Line 15. Wisconsin Net Income (Loss) –

If you did not check the box for excess inclusion income from a real estate mortgage investment conduit, subtract
line 14 from line 13. If line 13 shows a loss, enter the loss from line 13 on line 15.

If you checked the box for excess inclusion income from a real estate mortgage investment conduit, compute the
amount to enter on line 15 using the worksheet below:

IC-100 (R. 10-24) 26

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

Real Estate Mortgage Investment Conduit Excess Inclusion Income Computation:

1. Enter the total excess inclusion from federal Schedules Q (Form 1066),
line 2c for the taxable year 1. _______________
2. Enter the apportionment percentage from Form 4, line 8 2. _ _ _ . _ _ _ _ %
3. Multiply line 1 by line 2 3. _______________
4. Enter the amount from Form 4, line 15; however, if Form 4, line 15 is a loss, enter 0 4. _______________
• If line 4 is greater than line 3, there is no excess inclusion income adjustment required.
• If line 4 is less than line 3, enter the amount from line 3 on Form 4, line 15 and check the box to the left of
the line.

■ Line 16. Tentative Gross Tax – Enter 7.9% of the Wisconsin net income reported on line 15.

■ Line 17. Tax Adjustment for Insurance Companies – If the corporation is an insurance company, this is where
you adjust the tax liability so that it does not exceed 2% of gross premiums plus 7.9% of income realized from lottery
prizes. Compute the adjustment in Part IV of Schedule 4I. See the Schedule 4I instructions for details.

■ Line 18. Gross Tax – Subtract the amount on line 17 from the amount on line 16.

■ Line 19. Nonrefundable Credits – Enter the total available nonrefundable credits from Schedule CR. However, if
you choose to use less than the total available nonrefundable credits, enter the amount that you will use. See the
Tax Releases in Wisconsin Tax Bulletin issues 138 (April 2004), 139 (July 2004), and 196 (January 2017) for more
details on using carryforwards of net business losses and credits. You may access the Wisconsin Tax Bulletin on the
department’s web site at revenue.wi.gov/Pages/ISE/wtb-Home.aspx.

If you are using credits carried forward from prior years or have current year unused credits that are being carried
forward, complete a Schedule CF for each credit.

To determine if the corporation qualifies for any credits, see Publication 123, Business Tax Incentives (available on
the Department of Revenue’s web site at revenue.wi.gov/Pages/HTML/taxpubs.aspx). To claim a credit, complete
the appropriate credit schedule, enter the credit amount on the appropriate line of Schedule CR, and submit the credit
schedule and Schedule CR with your return.

NOTE: You must include both Schedules CR, CF, and the applicable credit schedule(s) with your return.

If you are claiming more than one credit, you must claim the credits in a specific order. See the Schedule CR instruc-
tions for details.

■ Line 20. Net Tax – Subtract line 19 from line 18. If line 19 is more than line 18, enter zero (0).

■ Line 21. Economic Development Surcharge – If the corporation is subject to the economic development sur-
charge, enter the greater of $25 or 3% of the gross tax on line 18, but not more than $9,800. See the section for
Economic Development Surcharge, under Who Must File Form 4, for more information on who is subject to the
economic development surcharge.

■ Line 22. Endangered Resources Donation – Your donation supports the preservation and management of more
than 200 endangered and threatened Wisconsin plants and animals. It also helps protect Wisconsin’s finest remaining
examples of prairies, forests, and wetlands.

Support endangered resources in Wisconsin. Fill in line 22 with the amount you wish to donate. Your gift will either
reduce your refund or be added to tax due.

You can make an online donation at the following web site:

IC-100 (R. 10-24) 27

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
https://www.billerpayments.com/app/donationsui/?bsn=swidnrdonations#/donations/payment 

You can also send a check directly to the Endangered Resources Fund, Department of Natural Resources, PO Box 
7921, Madison, WI 53707-7921. 

■ Line 23. Veterans Trust Fund Donation – You may designate an amount as a veterans trust fund donation. Your 
donation will be used by the Wisconsin Department of Veterans Affairs for the benefit of veterans or their dependents. 
Fill in line 23 with the amount you wish to donate. Your donation will either reduce your refund or be added to tax 
due. 

■ Line 25. Estimated Tax Payments – Enter estimated tax payments made by the corporation, including EFT pay-
ments, or overpayments applied from prior years’ returns, minus any “quick refund” applied for on Form 4466W.  

 CAUTION:  You cannot claim estimated tax payments that were made by a related corporation or other related 
 taxpayer. 
                                                                                                                          
■ Line 26. Wisconsin Tax Withheld – Enter your share of Wisconsin tax withheld from pass-through entities of 
which you are a member, as reported on Wisconsin Schedules 3K-1 or 2K-1. Include a copy of the Schedule 3K-1 or 
2K-1 with the tax return that you file. Also enter the amount of Wisconsin tax withheld from lottery prizes. 

If this is an amended return, enter the Wisconsin tax withheld reported on your original return, unless the amount you 
originally reported was incorrect. 

■ Line 27. Refundable Credits – Enter the total available refundable credits from Schedule CR. To determine if the 
corporation qualifies for any credits, see Publication 123, Business Tax Incentives (available on the Department of 
Revenue’s web site at revenue.wi.gov/Pages/HTML/taxpubs.aspx, under the “Publications” link). 

To claim a credit, complete the appropriate credit schedule, enter the credit amount on the appropriate line of Sched-
ule CR, and submit the credit schedule and Schedule CR with your return.  

 NOTE: You must include both Schedule CR and the applicable credit schedule(s) with your return.  
                                                                                                                          
■ Line 28. Amended Return - Amount Previously Paid - Complete this line only if this is an amended 2024 Form 
4.  Fill in the amount of tax you paid with your original Form 4 plus any additional amounts paid after it was filed. 

If you did not pay the full amount shown on your original Form 4, fill in only the portion that you actually paid. Also, 
include any additional tax that may have resulted if your original return was changed or audited. This includes addi-
tional tax paid with a previously filed 2024 amended return and additional tax paid because of a department adjust-
ment to your return. Do not include payments of interest or penalties. 

■ Line 30. Amended Return - Amount Previously Refunded - Complete this line only if this is an amended 2024 
Form 4. Fill in the refund from your original 2024 return (not including the amount applied to your 2025 estimated 
tax).  

If your refund was reduced because you owed underpayment interest or any penalties, fill in the amount of your 
refund before the reduction for underpayment interest or penalty. If your 2024 return was adjusted by the department, 
fill in the refund shown on the adjustment notice you received. If the adjustment notice shows a tax due rather than 
a refund, complete line 28 instead of line 30. 

■ Line 32. Interest, Penalty, and Late Fee Due –   Enter any interest, penalty, and late fee due, as computed on 
Form U, line 17 or 26. Check the box if you figured underpayment interest using the annualized income installment 
method on Form U, page 2. 

If you are filing an amended return and you were previously assessed interest for underpayment of estimated taxes, 
complete an amended Form U, Part I, based on the total of the amounts shown on Form 4, lines 20 and 21. Enter 
the difference between the underpayment interest from the amended Form U, line 17, and the amount you previously 

IC-100 (R. 10-24)                               28

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
paid on Form 4, line 32. Show an overpayment as a negative number. File Form U with your amended return. Other-
wise, leave Form 4, line 32 blank. The department will compute interest on the amount of refund approved or tax 
owed. 

■ Line 33. Amount Due –   If the total of lines 24 and 32 is larger than line 31, subtract line 31 from the total of lines 
24 and 32. Pay by electronic funds transfer  through My Tax Account, the department's free online business tax 
system, or mail your check with a 2024 Form Corp-ES,    Corporation Estimated Tax Voucher,    to the address shown 
on the voucher. Otherwise, paper clip your check to the front of Form 4 if filing by paper and you have an approved 
electronic filing waiver attached to the return. 

■ Line 34. Overpayment – If line 31 is larger than the total of lines 24 and 32, subtract the total of lines 24 and 32 
from line 31.  

 CAUTION: If you must recapture a development zones investment credit because the property is disposed of or 
 ceases to be qualified property before the end of the recapture period, add the amount from line 11 of the schedule 
 located on page 5 of the Schedule DC instructions to the tax due on line 33 or reduce the overpayment on line 34. 
                                                                                                                      
■ Line 35.  2025 Estimated Tax – Enter the amount of any overpayment from line 34 that is to be credited to the 
corporation’s 2025 estimated tax. The balance of any overpayment will be refunded. An overpayment shown on a 
corporation’s final return will be refunded to the corporation that made the payments. You cannot claim these pay-
ments on the surviving corporation’s return in a merger situation.   

Changing an Election to Apply a Refund to Estimated Tax 

Section 71.29(3), Wis. Stats., provides an election to apply all or a portion of a claimed refund to the following year's 
estimated tax payments, provided the refund has not been paid or applied elsewhere (for example, against a delin-
quent tax liability).  
An election to apply a refund to estimated tax may be changed to: 
• request payment of the refund, 
• credit the refund against an amended return tax liability for any year, or 
• credit the refund against a notice of amount due for any year. 
Notification of a change in election must occur on or before the unextended due date of the following year's tax return 
or before the following year's tax return is filed, whichever is earlier. 
 
The change in election must be in writing. You can file an amended return or send an email, fax, or letter to: 
 
•  DORFranchise@revenue.wi.gov 
•  Fax: (608) 267-0834 
•  Wisconsin Department of Revenue 
   Mail Stop 5-144 
   PO Box 8906 
   Madison WI 53708-8906 
 
If a timely election to move the estimated payments is not made, any tax due on the return is subject to interest from 
the unextended due date of the return until the date paid. Interest is due regardless of whether the original amount 
of estimated payments exceeded the tax due on the return because the estimated payments were moved to the next 
taxable year.   
 
Amended Returns 
 
If this is an amended return and you have already filed your 2024 return, include on line 35 the overpayment that you 
claimed as a credit on your 2024 return or on your previously filed original or amended 2024 return. Otherwise, you 
may allocate the overpayment from line 34 between line 35 and line 36 as you choose. 

IC-100 (R. 10-24)                                       29

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2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return

■ Line 37. Gross Receipts From All Activities – Enter total company gross receipts, gross sales, gross dividends,
gross interest income, gross rents, gross royalties, the gross sales price from the disposition of capital assets and
business assets, gross receipts passed through from other entities, and all other receipts that are included in gross
income before apportionment for Wisconsin franchise or income tax purposes.

■ Line 38. Total Assets – Enter the total company assets from the federal return.

■ Lines 39 and 40. Wisconsin and Total Company Property – Enter the total amount of the company’s real and
tangible property located in Wisconsin (line 39) and the company’s total amount of real and tangible property every-
where (line 40). Use the cost basis of the property as of the end of the year. Include the following types of property:
• Land
• Buildings
• Furniture and Fixtures
• Transportation equipment
• Machinery and other equipment
• Inventories
Include only property that is owned by the corporation; you do not need to include property you are renting.

■ Lines 41 and 42. Wisconsin and Total Company Payroll – Enter the total amount of the company’s payroll
located in Wisconsin (line 41) and the company’s total amount of payroll everywhere (line 42). Include only amounts
attributable to employees of the corporation. In the computation of payroll located in Wisconsin, include individuals
that satisfy one or more of the following:
• The individual’s service is performed entirely in Wisconsin.
• The individual’s service is performed in and outside Wisconsin, but the service performed outside Wisconsin is
incidental to the individual’s service in Wisconsin.
• A portion of the individual’s service is performed in Wisconsin and the base of operations of the individual is in
Wisconsin.
• A portion of the individual’s service is performed in Wisconsin and, if there is no base of operations, the place from
which the individual’s service is directed or controlled is in Wisconsin.
• A portion of the individual’s service is performed in Wisconsin and neither the base of operations of the individual
nor the place from which the service is directed or controlled is in any state in which some part of the service is
performed, but the individual’s residence is in Wisconsin.

■ Line 43. Wisconsin Sales – Complete this line only if you are using Schedule A-01, A-02, A-05, A-06, or A-08 to
determine your Wisconsin apportionment percentage. Enter the amount of Wisconsin sales, receipts, or premiums
from the applicable line:

• Schedule A-01: Total Wisconsin sales from Wisconsin column, line 10
• Schedule A-02: Total Wisconsin receipts from Wisconsin column, line 31
• Schedule A-05: Total Wisconsin premiums from Wisconsin column, line 3
• Schedule A-06: Total Wisconsin receipts from Wisconsin column, line 9
• Schedule A-08: Total Wisconsin receipts from Wisconsin column, line 18a

■ Line 44. Total Company Sales – Complete this line only if you are using Schedule A-01, A-02, A-05, A-06, or A-
08 to determine your Wisconsin apportionment percentage. Enter the amount of total sales, receipts, or premiums
from the applicable line:

• Schedule A-01: Total Wisconsin sales from Total Company column, line 10
• Schedule A-02: Total Wisconsin receipts from Total Company column, line 31
• Schedule A-05: Total Wisconsin premiums from Total Company column, line 3
• Schedule A-06: Total Wisconsin receipts from Total Company column, line 9
• Schedule A-08: Total Wisconsin receipts from Wisconsin column, line 18b

IC-100 (R. 10-24) 30

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
■ Lines 45 and 46. Limited Liability Companies – A single-member LLC that is disregarded for federal income tax 
purposes is also disregarded for Wisconsin franchise or income tax purposes. You must include the income of any 
disregarded entities owned by the corporation in the corporation’s amounts on the Wisconsin return. Check the "Yes" 
box if you were the sole owner of any disregarded entities and prepare and submit Schedule DE with this return. 

■ Line 47. Use Tax – A corporation may be liable for use tax. Use tax is the counterpart of sales tax. All tangible 
personal property, certain coins and stamps, certain leased properties affixed to real estate, certain digital goods, 
and selected services, taxable under Wisconsin’s sales tax law, which are stored, used, or consumed in Wisconsin, 
are subject to use tax if the proper sales tax is not paid. Examples of purchases that frequently result in a use tax 
liability include the following: 

•  Mail order and Internet purchases. You owe Wisconsin use tax if you buy such items as computers, furniture, or 
 office supplies from a vendor who is not registered to collect Wisconsin tax. 
•  Inventory. If you purchase inventory items without tax for resale, and then use these items instead of selling them, 
 you owe use tax. 
•  Give-aways. Generally, if you purchase items without tax and then give them away in Wisconsin, you owe use 
 tax. 
If you hold a seller’s permit, use tax certificate, or consumer’s use tax certificate, report your use tax on your sales 
and use tax return, Form ST-12. Otherwise, complete and file Form UT-5 to report use tax. 

For more information on use tax, visit the department’s web site at revenue.wi.gov/Pages/SalesAndUse/Home.aspx, 
call (608) 266-2776, e-mail DORSalesandUse@wisconsin.gov         . 

■ Lines 48 through 51. Contact Information and Miscellaneous –           Provide the information as instructed on the 
form. 

■ Line 52.  Uncertain Tax Positions.  If you were required to file federal Schedule UTP-Uncertain Tax Position 
Statement, include a copy of the schedule with your Wisconsin tax return. 
 
■ Line 53.  Reportable Transaction Disclosure Statement –If you were required to file federal Form 8886-Report-
able Transaction Disclosure Statement, include a copy of the form with your Wisconsin tax return. 
 
If a corporation was required to include any form with its federal tax return to disclose a “reportable transaction,” as 
defined under sec. 71.81(1)(c), Wis. Stats. ,it must file a copy of that form with the Department of Revenue within 60 
days of the date it is required to file it for federal income tax purposes, provided it is otherwise required to file a 
Wisconsin return.  

This includes federal Form 8886, Reportable Transaction Disclosure Statement. To file this form for Wisconsin pur-
poses, check the "yes" box on line 53 and submit the form with the return. 
 
■ Third Party Designee – If you want to allow a tax preparer or tax preparation firm, or any other person you choose 
to discuss your 2024 tax return with the Department of Revenue, check “Yes” in the “Third Party Designee” area of 
your return. Also, fill in the designee’s name, phone number, and any five digits the designee chooses as their per-
sonal identification number (PIN). If you check “Yes,” you are authorizing the department to discuss with the designee 
any questions that may arise during the processing of your return. You are also authorizing the designee to:  

•  Give the department any information missing from your return,  
•  Call the department for information about the processing of your return or the status of your refund or payment(s), 
 and  
•  Respond to certain department notices about math errors, offsets, and return preparation.  

You are not authorizing the designee to receive any refund check, bind you to anything (including any additional tax 
liability), or otherwise represent you before the department. If you want to expand the designee’s authorization, you 
must submit Form A-222 (Power of Attorney). The authorization will automatically end no later than the due date 
(without regard to extensions) for filing your 2025 tax return.  
 
■ Signatures – An officer of the corporation must sign at the bottom of page 3. If the return is prepared by someone 
other than an employee of the corporation, the individual who prepared the return must sign the form in the space 

IC-100 (R. 10-24)                                           31

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 
 
provided  for  the  preparer’s  signature  and  furnish  the  preparing  firm’s  federal  employer  identification  number.  A 
self-employed individual must enter “PTIN” and the preparer tax identification number in the space for the preparer’s 
federal employer identification number. 

■ Supplemental Schedules – Include the following items as supplemental schedules to your Form 4: 
•  Your federal return with all supporting forms/schedules 
•  A list of your solely owned LLCs (Schedule DE) 
•  Any extension of time to file your return 
•  Supporting schedules for Form 4  
•  Any attachments required for the supporting schedules you are filing, per the instructions to those schedules 

 NOTE: If you are filing electronically, you may submit supplemental schedules that are not pre-programmed into 
 your software in one of two ways: 
 1. Submitting them electronically in .pdf format along with your electronic return, or 
 2. Mailing them to the department with a Form W-RA, Required Attachments for Electronic Filing. 

Additional Information, Assistance, and Forms

Web Resources 

The Department of Revenue’s web page, available at revenue.wi.gov, has a number of resources to provide addi-
tional information and assistance, including: 
•  Related forms and their instructions  
• Common questions    
• Publications on specific tax topics 
•  The Wisconsin Tax Bulletin  
•  A home page specifically for combined reporting topics 
•  Links to the Wisconsin Statutes and Administrative Code 

Contact Information 

If you cannot find the answer to your question on the department’s web page, contact the department using any of 
the following methods: 

•  E-mail your question to:  DORFranchise@wisconsin.gov     
•  Call (608) 266-2772  
  (Telephone help is also available using TTY equipment. Call the Wisconsin Telecommunications Relay System at 
  711 or, if no answer, (800) 947-3529). 
•  Send a fax to (608) 267-0834 
•  Write to the Customer Service and Education Bureau, Wisconsin Department of Revenue, Mail Stop 5-77, PO 
  Box 8949, Madison, WI  53708-8949 
•  Call or visit any Department of Revenue office 

Obtaining Forms 
If you need forms or publications, you may:  

IC-100 (R. 10-24)                                  32

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                  2024 Form 4 Instructions for Non-Combined Corporation Franchise or Income Tax Return 

•  Download them from the department’s web site at revenue.wi.gov 
•  Call (608) 266-1961 
•  Call or visit any Department of Revenue office  
 
                       Applicable Laws and Rules 
 
 This document provides statements or interpretations of the following laws and regulations enacted as of October 
 16, 2024: Chapter 71 Wis. Stats., and Chapter Tax 2, Wis. Adm. Code 

IC-100 (R. 10-24)                                  33

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