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2021 Corporate Income Tax Forms
| Form | Instructions | Description |
|---|---|---|
| IL-1120 | Corporation Income and Replacement Tax Return |
|
| IL-1120-V | Payment Voucher for 2021 Corporation Income and Replacement Tax |
|
| IL-1120-X |
PDF |
Amended Corporation Income and Replacement Tax Return |
| IL-1120-X-V | Payment Voucher for Amended Corporation Income and Replacement Tax | |
| IL-477 | Replacement Tax Investment Credits | |
| IL-2220 | Computation of Penalties for Businesses |
|
| IL-4562 |
Special Depreciation | |
| Schedule INL | Illinois Net Loss Adjustments for Cooperatives and REMIC Owners | |
| Schedule INS | Tax for Foreign Insurers | |
| Schedule J | Foreign Dividends |
|
| Schedule M | Other Additions and Subtractions (for businesses) |
|
| Schedule NB | Nonbusiness Income | |
| Schedule UB | Combined Apportionment for Unitary Business Group | |
| Schedule UB/INS | Tax for a Unitary Business Group with Foreign Insurer Members | |
| Schedule 80/20 | Related-Party Expenses | |
| Schedule 1299-B | River Edge Redevelopment Zone or Foreign Trade Zone (or sub-zone) Subtractions (for corporations and fiduciaries) | |
| Schedule 1299-D | Income Tax Credits (for corporations and fiduciaries) |
|
| Schedule 1299-I |
| Income Tax Credits Information and Worksheets |
| Schedule 4255 | Recapture of Investment Tax Credits | |
| Subgroup Schedule (UB) | PDF |
Subgroup Schedule |