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                    ILLINOIS DEPARTMENT OF REVENUE 

                    DRAFT FORM 

Note: The draft you are looking for begins on the next page. 

Caution: DRAFT—NOT FOR FILING 

This is an early release draft of an Illinois Department of Revenue (IDOR) tax form or instructions, which 
IDOR is providing for substitute forms providers. Do not file draft forms and do not rely on draft forms 
and instructions for filing. We incorporate all significant changes to forms posted with this coversheet. 
However, unexpected issues occasionally arise, or legislation is passed—in this case, we will post a new 
draft of the form to alert users that changes were made to the previously posted draft.  

All forms and instructions have a page on our website at Tax Forms (illinois.gov) where you may see the 
final versions once they are released. Year-end income tax forms are usually released towards the end 
of January. 

If you wish, you can submit comments and questions to IDOR about draft or final forms and instructions 
at REV.VendorForms@illinois.gov. We will forward this information to the Office of Publications 
Management, where forms and publications are administered. 

IDR-1-DIS (N-08/23)          Printed by authority of State of Illinois, web only – one copy. 
 



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                                                                                                                                                            Illinois Department of Revenue
                                                                                                                                                                                                                        *32912231V*
                                                                                                                                                            2023 IL-1120-ST-X  
                                    
                                                                                                                                                            Amended Small Business Corporation Replacement Tax Return
                                                                                                                                                            For tax years ending on or after December 31, 2023.
                                    
                                                  Indicate what tax year you are amending:  Tax year beginning                                                                                                                                           , ending                                         Enter the amount you 
                                                                                                                                                                                                                  month day    year                                   month   day         year               are paying.
                                                                                                                                                        If you are filing an amended return for tax years ending before December 31, 2023, 
                                                                                                                                                          you may not use this form. For prior years, see instructions to determine the correct form to use.                                             $ 
                                   Step 1:  Identify your small business corporation                                                                                                                                          N    Enter your federal employer identification number (FEIN).
                                   A                                                                                                       Enter your complete legal business name. 
                                   TENTATIVE                                                                                               If                                                                                 O                               CheckFINAL                                                                                                                                    havethisyou                                               aaare     membernameyou        box if                           a  thisof            change, check box.  
                                                                                                                                           Name:                                                                                                          unitary business group, and enter the FEIN of the  
                                                                                                                                                                                                                                                          member who prepared the Schedule UB, Combined  
                                   B                                                                                                       Enter your mailing address.                                                                                    Apportionment for Unitary Business Group. Attach  
                                                                                                                                           C/O:                                                                                                           Schedule UB to this return.
                                                                                                                                           Mailing address:                                                                                                
                                                                                                                                           City:                                     State:            ZIP:                   P                           Enter your North American Industry Classification  
                                                                                                                                                                                                                                                          System (NAICS) Code. See instructions.                                
                                   C                                                                                                       Check this box if you are filing this form only to report an increased 
                                                                                                                                           net loss on Line 49, Column B. 
                                                                                                                                                                                                                              Q                           Enter your Illinois corporate file (charter) number.  
                                   D                                                                                                       Check this box if you attached Form IL-4562.                                  
                                   E  Check this box if you attached Schedule M.                                                                                                                                              R    Check this box if you are filing Form IL-1120-ST-X  
                                   F  Check this box if you attached Schedule 80/20.                                                                                                                                                                      before the extended due date and making the 
                                                                                                                                                                                                                                              election to treat all nonbusiness income as  
                                   G                                                                                                       Check this box if you attached Schedule 1299-A.                                                                business income.                                                   
                                   H                                                                                                       Check this box if you attached the Subgroup Schedule.                              S                           If you have completed the following, check the box 
                                   I                                                                                                       Check the applicable box for the type of change being made.                                        and attach the federal form(s) to this return, if you  
                                                                                                                                             NLD               State change               Federal change                                                  have not previously done so. 
                                                                                                                                           If a federal change, check one:                                                                                    Federal Form 8886                           Federal Schedule   
                                                                                                                                             Partial agreed                         Finalized                                                                                                            M-3, Part II, Line 10
                                                                                                                                                                                                                              T                           If you are making a discharge of indebtedness 
                                                                                                                                           Enter the finalization date                                                                        adjustment on Schedule NLD or Form IL-1120-ST,
                                                                                                                                           Attach your federal finalization to this return.                                                   Line 48, check this box and attach federal                                        
                                   J                                                                                                       Throwback adjustment - see instructions.                                                                       Form 982.                                                                           
                                   K                                                                                                       Double throwback adjustment - see instructions.                                    U    Check this box if your business activity is 
LawPublic under                    L                                                                                                       Check                                                                                              protected                                                                                                                          86-272.                                               thisaare                       52/53 weekyou                  box if                                    filer.      
                                                                                                                                                                                                                              V    If you are paying Pass-through Entity (PTE) Tax and  
                                   M                                                                                                       Check this box if you elected to file and pay Pass-through Entity 
                                                                                                                                                                                                                                                          you annualized your income on Form IL-2220,  
                                                                                                                                           (PTE) Tax.                                                                      
                                                                                                                                                                                                                                                          check this box and attach Form IL-2220.                                                                        
                                                                                                                                                  Explain the changes on this return (Attach                                                                                                                                                                                                                                        anecessary.)separateif                                     sheet 

                                           Step 2:  Figure your ordinary income or loss                                                                                                                                                                                   A                                  B
                                                                                                                                                                                                                                                           As most recently                                        Corrected   
                                                                                                                                                                                                                                                           reported or adjusted                                     amount     
                                                                                                                                                                                                                                                                            00                 1                               00 
                                                                                                                                           1  Ordinary income or loss or equivalent from U.S. Schedule K.                                   1   
                                                                                                                                           2         Net income or loss from all rental real estate activities.                             2                               00                 2                               00 
activitiesincomerental lossother          Net                                                                                              3                                                                                                3                               00                 3                               00                                        or                                 from 
income       Portfolio                                                                                                                     4                                                                                                4                               00                 4                               00                                                loss.or 
                                                                                                                                           5         Net IRC Section 1231 gain or loss.                                                     5                               00                 5                               00
incomeof                                  All6                                                                                                                                                                                                                                                                                                                                   lossitems                       or         other        wereof      that                                            computation        the    not included in 
                                           income or loss on Page 1 of U.S. Form 1120S. Identify: ___________________  6                                                                                                                                                    00                 6                               00
                                                     Attach your payment and                                      Form IL-1120-ST-X-V here.
                                                                                                                                           7         Add Lines 1 through 6. This is your ordinary income or loss.                           7                               00                 7                               00
                                   Step 3:  Figure your unmodified base income or loss 
contributions.                         8Charitable                                                                                                                                                                                          8                               00                 8                               00
                                       9Expense.                                                                                                                                                                                            9                               00                 9                               00                                        deductionIRC Sectionunder                                                                              179
indebtedness                       10                                        Interest.                                                                                                                                                      10                              00            10                                   00                                                             investment                            on 
                                     11  All other items of expense that were not deducted in the computation of ordinary 
                                       income or loss on Page 1 of U.S. Form 1120S. Identify: ___________________                                                                                                                           11                              00            11                                   00
                                     12  Add Lines 8 through 11.                                                                                                                                                                            12                              00            12                                   00
                                    13                                       Subtract Line 12 from Line 7.  This is your
                                       total unmodified base income or loss.                                                                                                                                                                13                              00            13                                   00
                                    
                                                                                                                                                     IL-1120-ST-X (R-12/23)       This form is authorized as outlined by the Illinois Income Tax Act. Disclosure of this                                    Page 1 of 5
                                                                                                                                                                                   information is REQUIRED. Failure to provide information could result in a penalty. 



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                                                                                                                                  *32912232V*
                                     Step 4:  Figure your income or loss                                                                           A                                                     B
                                                                                                                                                   As most recently                                      Corrected
                                                                                                                                                   reported or adjusted                                  amount
                                       14                  Enter the amounts from Line 13. Unitary filers, see instructions.            14                                     00        14                          00
                                       15                  State, municipal, and other interest income excluded from Line 14.           15                                     00        15                          00
                                      16                   Illinois replacement tax and surcharge deducted in arriving at Line 14.      16                                     00        16                          00
                                      17                   Illinois Special Depreciation addition. Attach Form IL-4562.                 17                                     00        17                          00
                                      18                   Related-Party Expenses addition. Attach Schedule 80/20.                      18                                     00        18                          00
K-1-T. additions.K-1-P or of         TENTATIVE 19          DistributiveAttach Schedule(s)                                               19                                     00        19              FINAL00                                    share 
                                      20                   The amount of loss distributable to a shareholder subject to
                                           replacement tax. Attach Schedule B.                                                          20                                     00        20                          00
                                      21                   Other additions. Attach Schedule M (for businesses).                         21                                     00        21                          00
                                      22                   Add Lines 14 through 21. This is your total income or loss.                  22                                     00        22                          00
                                       Step 5:  Figure your base income or loss 
                                      23  Interest income from U.S. Treasury and exempt federal obligations.                            23                                     00        23                          00
                                      24                   Share of income distributable to a shareholder subject to
                                           replacement tax. Attach Schedule B.                                                          24                                     00        24                          00
                                      25  River Edge Redevelopment Zone Dividend subtraction. Attach Schedule 1299-A. 25                                                       00        25                          00
                                       26                  River Edge Redevelopment Zone Interest subtraction. Attach Schedule 1299-A. 26                                      00        26                          00
                                      27                   High Impact Business Dividend subtraction. Attach Schedule 1299-A.           27                                     00        27                          00
                                      28                   High Impact Business Interest subtraction. Attach Schedule 1299-A.           28                                     00        28                          00
                                      29                   Contribution subtraction. Attach Schedule 1299-A.                            29                                     00        29                          00
                                      30                   Illinois Special Depreciation subtraction. Attach Form IL-4562.              30                                     00        30                          00
                                      31                   Related-Party Expenses subtraction. Attach Schedule 80/20.                   31                                     00        31                          00
                                      32                   Distributive share of subtractions. Attach Schedule(s) K-1-P or K-1-T.       32                                     00        32                          00
                                      33                   Other subtractions. Attach Schedule M (for businesses).                      33                                     00        33                          00
23 throughsubtractions.  34  Total                                                                                                      34                                     00        34                          00          Lines     33.            Add 
                                       35                  Base income or loss. Subtract Line 34 from Line 22.                          35                                     00        35                          00

                                                              A    If the amount on Line 35 is derived inside Illinois only, check this box and enter the amount from Step 5, Line 35
                                                                    on Step 7, Line 47. You may not complete Step 6. (You must leave Step 6, Lines 36 through 46 blank.)
                                                                   If you are a unitary filer, do not check this box. Check the box on Line B and complete Step 6.
                                                              B  If any portion of the amount on Line 35 is derived outside Illinois, or you are a unitary filer, check this box and                                 
                                                                  complete all lines of Step 6. (Do not leave Lines 40 through 42 blank.) See instructions. 

                                         Step 6:  Figure your income allocable to Illinois (Complete only if you checked the box on Line B, above.)
                                       36                  Nonbusiness income or loss. Attach Schedule NB.                              36                                     00        36                          00
                                       37                  Business income or loss included in Line 35 from non-unitary partnerships,
                                             partnerships included on a Schedule UB, S corporations, trusts, or estates. 
                                             See instructions.                                                                          37                                     00        37                          00
                                         38  Add Lines 36 and 37.                                                                       38                                     00        38                          00
                                         39  Business income or loss. Subtract Line 38 from Line 35.                                    39                                     00        39                          00
                                         40  Total sales everywhere. This amount cannot be negative.                                    40                                     00        40                          00
                                         41  Total sales inside Illinois. This amount cannot be negative.                               41                                     00        41                          00
                                         42  Apportionment factor. Divide Line 41 by Line 40. Round to six decimal places.  42                                                            42      
                                         43  Business income or loss apportionable to Illinois. Multiply Line 39 by Line 42.            43                                     00          43                        00
                                         44  Nonbusiness income or loss allocable to Illinois. Attach Schedule NB.                      44                                     00        44                          00
                                       45                  Business income or loss apportionable to Illinois from non-unitary
                                             partnerships, partnerships included on a Schedule UB,   
                                             S corporations, trusts, or estates. See instructions.                                      45                                     00        45                          00
                                         46                Base income or loss allocable to Illinois. Add Lines 43 through 45.          46                                     00        46                          00

                                                           IL-1120-ST-X (R-12/23)              Printed by the authority of the state of Illinois - electronic only - one copy.                           Page 2 of 5



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                                                                                                                                                                   *32912233V*
                                                                             Step 7:  Figure your net income                                                                                 A                                    B
                                                                                                                                                                                     As most recently                            Corrected
                                                                                                                                                                                     reported or adjusted                         amount 
                                                                               47            Base income or net loss from Step 5, Line 35 or Step 6, Line 46.                  47                          00       47                    00
                                                                               48            Discharge of indebtedness adjustment. Attach federal Form 982.                    48                          00       48                    00
                                                                               49            Adjusted base income or net loss. Add Lines 47 and 48.                            49                          00       49                    00
                                                                              50             Illinois net loss deduction. Attach Schedule NLD.                                 50                          00       50                    00
                                                                                             If Line 49 is zero or a negative amount, enter zero.
haveyou if                                                                   TENTATIVE   Check                                                                                                                                    FINAL              merged losses.statement       thisa detailed                                                         box and attach 
                                                                               51            Net income. Subtract Line 50 from Line 49.                                        51                          00       51                    00
                                                                             Step 8:  Figure the taxes, surcharges, and pass-through withholding you owe
                                                                               52            Replacement tax. Multiply Line 51 by 1.5% (.015).                                 52                          00       52                    00
                                                                               53  Recapture of investment credits. Attach Schedule 4255.                                      53                          00       53                    00
                                                                              54  Replacement tax before investment credits. Add Lines 52 and 53  .                            54                          00       54                    00
                                                                               55            Investment credits. Attach Form IL-477.                                           55                          00       55                    00
                                                                              56             Net replacement tax. Subtract Line 55 from Line 54. If negative, enter zero.  56                              00       56                    00
                                                                               57  Compassionate Use of Medical Cannabis Program Act surcharge. See instr.  57                                             00       57                    00
                                                                               58  Sale of assets by gaming licensee surcharge. See instructions.                              58                          00        58                   00
                                                                               59  Pass-through withholding you owe on behalf of your members. Enter the amount
                                                                                   from Schedule B, Section A, Line 5. See instructions. Attach Schedule B.                    59                          00       59                    00
                                                                              60  Pass-through entity income. See instructions.                                               60                           00       60                    00  
                                                                              61             Pass-through entity tax. Multiply Line 60 by 4.95% (.0495).                       61                          00       61                    00
                                                                              62  Total taxes, surcharges, and pass-through withholding.
                                                                                             Add Lines 56, 57, 58, 59, and 61.                                                                                      62                    00
                                                                             Step 9:  Figure your refund or balance due
                                                                              63             Payments. See instructions.
                                                                                             a  Credits from previous overpayments.                                                                              63a                      00
                                                                                             b  Total payments made before the date this amended return is filed.                                                63b                      00
                                                                                             c    Pass-through withholding reported to you. Attach Schedule(s) K-1-P or K-1-T.                                   63c                      00
                                                                                             d    Illinois income tax withholding. Attach Form(s) W-2G.                                                          63d                      00
                                                                              64  Total payments. Add Lines 63a through 63d.                                                                                        64                    00
                                                                              65             Previously paid penalty and interest. See instructions.                                                                65                    00
                                                                              66  Total amount of overpayment (including any carryforward or refund) before the filing of this return 
                                                                                   for the year being amended.  See instructions.                                                                                   66                    00
                                                                              67  Add Lines 65 and 66.                                                                                                              67                    00
                                                                              68  Net tax paid. Subtract Line 67 from Line 64.                                                                                      68                    00
                                                                              69             Overpayment. If Line 68 is greater than Line 62, subtract Line 62 from Line 68.                                        69                    00
                                                                              70  Amount of overpayment from Line 69 to be credited forward. See instructions.                                                      70                    00
                                                                                             Check this box and attach a detailed statement if this carryforward is going to a different FEIN.                       
                                                                              71             Refund. Subtract Line 70 from Line 69. This is the amount to be refunded.                                              71                    00
                                                                              72                 Tax due with this amended return. If Line 62 is greater than Line 68, subtract Line 68 from Line 62.               72                    00
                                                                                        You will be sent a bill for any additional penalty and interest. 
                                                                                                                                     Enter the amount of your payment on the top of Page 1 in the space provided.

I stateperjury, of I havethat penalties thisexamined and complete.           Step 10: Sign below -                  Under                                                                                                                            true,bestthe is           myreturncorrect, of         it               and, to            knowledge, 
                                                                             Sign                                                                                                                                        Check if the Department 
                                                                             Here                                                                                                   (      )                     may discuss this return with the 
                                                                                                 Signature of authorized officer     Date (mm/dd/yyyy) Title                         Phone                       paid preparer shown in this step.
                                                                                                                                                                                                                       Check if  
                                                                             Paid                    Print/Type paid preparer’s name        Paid preparer’s signature                Date (mm/dd/yyyy)          self-employed    Paid Preparer’s PTIN
                                                                             Preparer
                                                                                                     Firm’s name                                                                                           Firm’s FEIN
                                                                             Use Only
                                                                                                     Firm’s address                                                                                        Firm’s phone   (      )

                                                                                                           Mail this return to: Illinois Department of Revenue, P.O. Box 19016, Springfield, IL 62794-9016  

                                                                                                 IL-1120-ST-X (R-12/23)                                                                                                    Page 3 of 5



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                 Illinois Department of Revenue                                                                                      Year ending
                                                                  *30812231V*
                 2023 Schedule B 
               Partners’ or Shareholders’ Information                                                                                                           Month      Year
                   Attach to your Form IL-1065 or Form IL-1120-ST.                                                                                              IL Attachment No. 1
                                                                                                                             
Enter your name as shown on your Form IL-1065 or Form IL-1120-ST.                                    Enter your federal employer identification number (FEIN).
Read this information first
     You must read the Schedule B instructions and complete Schedule(s) K-1-P and Schedule(s) K-1-P(3) before completing this 
TENTATIVE FINAL
       schedule. 
     You must complete Section B of Schedule B and provide all the required information for your partners or shareholders before 
       completing Section A of Schedule B. 
          Failure to follow these instructions may delay the processing of your return or result in you receiving further correspondence from 
       the Illinois Department of Revenue. You may also be required to submit further information to support your filing.
Section A:  Total members’ information (from Schedule(s) K-1-P and Schedule B, Section B)
                  Before completing this section you must first complete Schedule(s) K-1-P, Schedule(s) K-1-P(3) and Schedule B, Section B. You               
                 will use the amounts from those schedules when completing this section.

Totals for resident and nonresident partners or shareholders (from Schedule(s) K-1-P and Schedule B, Section B)
1  Enter the total of all nonbusiness income or loss you reported on Schedule(s) K-1-P for your members. 
   See instructions.                                                                                                                                      1    

2  Enter the total of all income and replacement tax credits you reported on Schedule(s) K-1-P for your 
   members. See instructions.                                                                                                                             2     

3  Add the amounts shown on Schedule B, Section B, Line E for all partners or shareholders on all 
   pages for which you have checked the box indicating the entity is subject to Illinois replacement tax 
   or an ESOP. Enter the total here. See instructions.                                                                                                    3     

Totals for nonresident partners or shareholders only (from Schedule B, Section B)
4  Enter the total pass-through withholding you reported on all pages of your Schedule B, Section B, Line J for your 
    
  a.   nonresident individual members. See instructions.                                                                                                  4a  
 
  b.   nonresident estate members. See instructions.                                                                                                      4b  
 
  c.   partnership and S corporation members. See instructions.                                                                                           4c  
 
  d.   nonresident trust members. See instructions.                                                                                                       4d  
 
  e.   C corporation members. See instructions.                                                                                                           4e  

5  Add Line 4a through Line 4e. This is the total pass-through withholding you owe on behalf of all your 
   nonresident partners or shareholders. This amount should match the total amount from Schedule B, 
   Section B, Line J for all nonresident partners or shareholders on all pages. Enter the total here and 
   on Form IL-1065 (Form IL-1065-X), Line 59, or Form IL-1120-ST (Form IL-1120-ST-X), Line 59. 
   See instructions.                                                                                                                                      5  

6  Enter the total pass-through entity tax credit paid on all pages of Schedule B, Section B, Line K.                                                     6 

7  Enter the total pass-through entity tax credit received and distributed on all pages of Schedule B, 
   Section B, Line L.                                                                                                                                     7 
                                                                                                                                                                                                                                                                                           
                   Attach all pages of Schedule B, Section B behind this page.

                                                                  This form is authorized as outlined by the Illinois Income Tax Act. Disclosure of this 
       Schedule B (R-12/23)                                       information is REQUIRED. Failure to provide information could result in a penalty.            Page 4 of 5



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                   Illinois Department of Revenue                      *30812232V*

                2023 Schedule B
             
Enter your name as shown on your Form IL-1065 or Form IL-1120-ST.               Enter your federal employer identification number (FEIN).
 
Section B:  Members’ information (See instructions before completing.)

                               Member 1                                  Member 2                                 Member 3 
TENTATIVE FINAL
 A  Name                                                                                                                            

    C/O                                                                                                                              

    Address 1                                                                                                                        

    Address 2                                                                                                                        

    City                                                                                                                             

    State, ZIP                                                                                                                       

 B  Partner or 
      Shareholder                                                                                                                  

 C  SSN/FEIN                                                                                                                         

 D  Subject to Illinois  
    replacement tax  
    or an ESOP                                                                                                     

 E  Member’s distributable  
    amount of base  
    income or loss                                                                                                                   

 F   Excluded from  
    pass-through  
    withholding                                                                                                                    

 G  Share of Illinois  
    income subject to  
    pass-through  
    withholding                                                                                                   

 H  Pass-through  
    withholding 
    before credits                                                                                                

 I  Distributable  
    share of credits                                                                                                                 

 J  Pass-through  
    withholding  
    amount                                                                                                                           

 K  PTE tax credit  
    paid to 
    members                                                                                                                          

 L  PTE tax credit  
    received and  
    distributed to  
    members                                                                                                                          
    
                                 If you have more members than space provided, attach additional copies of this page as necessary.
         Schedule B (R-12/23)  Printed by the authority of the state of Illinois - electronic only - one copy.    Page 5 of 5






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