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Attach supporting documents to your Form IL-1120-X. *ZZZZZZZZZ*
If you completed: Attach:
Form IL-1120-X U.S. 1120-X, and U.S.1139 or federal RAR (if applicable)
Step 1, Line C (unitary) only Schedule UB/Subgroup Schedule
Check the box on Form IL-1120-X, Step 1, Lines F/G
Step 1, Line C (foreign insurer) only Schedule INS
Step 1, Line C (unitary) and (foreign insurer) Schedule UB/Subgroup Schedule and Schedule UB/INS
Check the box on Form IL-1120-X, Step 1, Lines F/G
Step 1, Line E Federal Form 8886 or Federal Schedule M-3 (as applicable)
Step 1, Line R Federal Form 982
TENTATIVEStep 1, Line S Schedule INL FINAL
Step 1, Line T Form IL-2220
Line 1 (if changed) Federal finalization (for example, copy of federal refund check, audit
report from the IRS, or federal transcript verifying your federal
taxable income)
Lines 5 and 18 Form IL-4562
Special Depreciation addition Check the box on Form IL-1120-X, Step 1, Line I
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Special Depreciation subtraction
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Lines 6 and 19 Schedule 80/20
Related-Party Expenses addition Check the box on Form IL-1120-X, Step 1, Line K
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Related-Party Expenses subtraction
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Lines 7 and 20 Schedule(s) K-1-P or K-1-T
Distributive share of additions
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Distributive share of subtractions
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Lines 8 and 21 Schedule M and any required support listed on Schedule M
Other additions Check the box on Form IL-1120-X, Step 1, Line J
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Other subtractions
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Lines 11 through 15 Schedule 1299-B and any required support listed on Schedule 1299-B
River Edge Redevelopment Zone Dividend subtraction
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River Edge Redevelopment Zone Interest subtraction
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High Impact Business Dividend subtraction
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High Impact Business Interest subtraction
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Contribution subtraction
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Line 17 Foreign Dividend subtraction Illinois Schedule J, and U.S. 1120, Schedule C or equivalent
Lines 24 and 32 Schedule NB
Nonbusiness income or loss
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Nonbusiness income or loss allocable to Illinois
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Lines 25 and 33 Schedule(s) K-1-P or K-1-T
Business income or loss from non-unitary
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partnerships, partnerships included on a Schedule UB,
S corporations, trusts, or estates
Business income or loss apportionable to Illinois from
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non-unitary partnerships, partnerships included on a
Schedule UB, S corporations, trusts, or estates
Lines 28 through 30 (if changed) Any and all out-of-state returns
Line 36 Discharge of indebtedness adjustment Federal Form 982
Check the box on Form IL-1120-X, Step 1, Line R
Line 38 Illinois Net Loss Deduction Schedule NLD or UB/NLD (for unitary filers)
Lines 41 and 46 Recapture of investment credits Schedule 4255
Line 43 Investment credits Form IL-477 and any required support listed on Form IL-477
Line 48 Income tax credits Schedule 1299-D and any required support listed in the Schedule
1299-D instructions or Schedule 1299-I
Check the box on Form IL-1120-X, Step 1, Line H
Lines 51 and 54 Foreign Insurer tax reduction Schedule INS or Schedule UB/INS (for unitary filers)
Check the box on Form IL-1120-X, Step 1, Line C
Line 59c Pass-through withholding reported All Schedules K-1-P and K-1-T you received showing
to you pass-through withholding
Line 59d Pass-through entity tax credit All Schedules K-1-P and K-1-T you received showing
reported to you pass-through entity tax credit
Line 59e Illinois income tax withholding Copies of all Forms W-2G
**Failure to attach the required documents may result in the disallowance of the corresponding line item.**
IL-1120-X (R-12/23) Page 4 of 4
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