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About IDOR
| Name | Description | |
|---|---|---|
| IL-1120 | Instr. | Corporation Income and Replacement Tax Return (R-12/09) |
| IL-1120-ES | 2010 Estimated Income Replacement Tax Payments for Corporations (R-12/09) | |
| IL-1120-X | Instr. | Amended Corporation Income and Replacement Tax Return (R-12/09) |
| IL-477 | Replacement Tax Investment Credits (R-12/09) | |
| IL-505-B | Automatic Extension Payment (R-12/09) | |
| IL-2220 | Instr. | Computation of Penalties for Businesses (R-12/09) |
| IL-4562 | Special Depreciation (R-12/09) | |
| Sch. INS | Tax for Foreign Insurers (R-12/09) | |
| Sch. J | Foreign Dividends (R-12/09) | |
| Sch. M | Other Additions and Subtractions (for businesses) (R-12/09) | |
| Sch. NB | Nonbusiness Income (R-12/09) | |
| Sch. NLD | Illinois Net Loss Deduction (R-12/09) | |
| Sch. UB | Instr. | Combined Apportionment for Unitary Business Group (R-12/09) |
| Sch. UB/INS | Tax for a Unitary Business Group with Foreign Insurer Members (R-12/09) | |
| Sch. UB/NLD | Unitary Illinois Net Loss Deduction (R-12/09) | |
| Sch. 80/20 | Related Party Expenses (R-12/09) | |
| Sch. 1299-B | Enterprise Zone or Foreign Trade Zone (sub-zone) Subtractions (for corporations & fiduciaries) (R-12/09) | |
| Sch. 1299-D | Instr. | Income Tax Credits (for corporations & fiduciaries) (R-12/09) |
| Sch. 1299-S | Enterprise Zones, Foreign Trade Zones, and Sub-Zones (R-12/09) | |
| Sch. 4255 | Recapture of Investment Tax Credits (R-12/09) | |