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Illinois Department of Revenue
*32912231W*
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.
ahave If O Check thisyou namea checkarechange, ayou thisboxof member if 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
Lawunder Public 86-272. L Check protected thisare ayou box52/53 weekif 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 necessary.) aif separate 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
fromrentalother loss activitiesor income Net 3 3 00 3 00
Portfolio4 4 00 4 00 loss. or income
5 Net IRC Section 1231 gain or loss. 5 00 5 00
that wereloss or income notof ofcomputation the includeditems in other All 6
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
8Charitable8 00 8 00 contributions.
under IRC Section 179deduction 9Expense . 9 00 9 00
indebtedness investment on 10 Interest . 10 00 10 00
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.
