2024 Small Business Corporation Replacement Tax Forms
Name | Instructions | Description |
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IL-1120-ST |
PDF |
Small Business Corporation Replacement Tax Return (includes Schedule B) |
IL-1120-ST-V | Payment Voucher for Small Business Corporation Replacement Tax To make a return or extension payment, use this voucher and Appendix A of Form IL-1120-ST Instructions. Important: Ensure the proper month and year of the filing period you wish to make a payment for is entered on the "Tax year ending" lines of the voucher. |
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IL-1120-ST-X |
PDF | Amended Small Business Corporation Replacement Tax Return (includes Schedule B) |
IL-1120-ST-X-V | Payment Voucher for Amended Small Business Corporation Replacement Tax Important: Ensure the proper month and year of the filing period you wish to make a payment for is entered on the "Tax year ending" lines of the voucher. |
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IL-477 | Replacement Tax Investment Credits |
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IL-1000-E | Certificate of Exemption for Pass-through Withholding Payments | |
IL-2220 | Computation of Penalties for Businesses |
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IL-4562 | Special Depreciation | |
Schedule F | Gains from Sales or Exchanges of Property Acquired Before August 1, 1969 | |
Schedule K-1-P |
Partner's or Shareholder's Share of Income, Deductions, Credits, and Recapture | |
Schedule K-1-T(1) | Instructions for Partnerships and S Corporations Completing Schedule K-1-P, Schedule K-1-P(3), and Schedule K-1-P(4) |
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Schedule K-1-T(2) | Partner's and Shareholder's Instructions | |
Schedule K-1-P (3) | Pass-through Withholding Calculation for Nonresident Members | |
Schedule M | Other Additions and Subtractions (for businesses) |
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Schedule NB | Nonbusiness Income | |
Schedule NLD | Illinois Net loss Deduction | |
Schedule UB |
Combined Apportionment for Unitary Business Group | |
Schedule 80/20 | Related-Party Expenses | |
Schedule 1299-A | Tax Subtractions and Credits (for partnerships and S corporations) | |
Schedule 1299-I | Income Tax Credits Information and Worksheets Updated 03/25/2025 - Taxpayers claiming the REV Illinois Investment Credit or MICRO Investment Credit are now required to attach a copy of their worksheet rather than a DCEO certificate. |
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Schedule 4255 | Recapture of Investment Tax Credits | |
Subgroup Schedule (UB) | Subgroup Schedule |