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2018 Corporate Income Tax Forms
| Name | Description | |
|---|---|---|
| IL-1120 | Instructions | Corporation Income and Replacement Tax Return |
| IL-1120-X | Instructions | Amended Corporation Income and Replacement Tax Return |
| IL-1120-V | Payment Voucher for Corporation Income and Replacement Tax |
|
| 2019-IL-1120-V | | To make an estimated payment or prepayment for tax years ending on or after December 31, 2019 |
| IL-1120-X-V | Payment Voucher for Amended Corporation Income and Replacement Tax | |
| IL-477 | Instructions | Replacement Tax Investment Credits |
| IL-2220 | Instructions | Computation of Penalties for Businesses |
| IL-4562 |
Instructions | Special Depreciation |
| Schedule INL | Instructions | Illinois Net Loss Adjustments for Cooperatives and REMIC Owners |
| Schedule INS | Instructions | Tax for Foreign Insurers |
| Schedule J | Instructions | Foreign Dividends |
| Schedule M | Instructions | Other Additions and Subtractions (for businesses) |
| Schedule NB | Instructions | Nonbusiness Income |
| Schedule NLD | Instructions | Illinois Net Loss Deduction |
| Schedule UB | Instructions | Combined Apportionment for Unitary Business Group |
| Schedule UB/INS | Instructions | Tax for a Unitary Business Group with Foreign Insurer Members |
| Schedule UB/NLD | Instructions | Unitary Illinois Net Loss Deduction |
| Schedule 80/20 | Instructions | Related-Party Expenses |
| Schedule 1299-B | Instructions | River Edge Redevelopment Zone or Foreign Trade Zone (or sub-zone) Subtractions (for corporations and fiduciaries) |
| Schedule 1299-D | Instructions | Income Tax Credits (for corporations and fiduciaries) |
| Schedule 1299-I |
| Income Tax Credits Information and Worksheets |
| Schedule 4255 | Instructions | Recapture of Investment Tax Credits |
| Subgroup Schedule (UB) | Instructions |
Subgroup Schedule |