Illinois Department of Revenue
 
 
Tax Forms
 
 
 
 
 

2010 Corporate Income Tax Forms

 
 
Name Description
IL-1120 Instr. Corporation Income and Replacement Tax Return (R-12/10) 

IL-1120-ES

  2011 Estimated Income Replacement Tax Payments for Corporations (R-12/10)
IL-1120-X Instr. Amended Corporation Income and Replacement Tax Return (R-12/10) 
IL-477   Replacement Tax Investment Credits (R-12/10) 

IL-505-B

  Automatic Extension Payment (R-12/10)
IL-2220 Instr. Computation of Penalties for Businesses (R-12/10) 
IL-2220-FY Instr. Computation of Penalties for Businesses (for Fiscal Filers) (N-03/11) 
IL-4562
  Special Depreciation (R-02/11) 
Sch. INL   Illinois Net Loss Adjustment for Cooperatives (N-12/10) 
Sch. INS   Tax for Foreign Insurers R-(R-12/10) 
Sch. J   Foreign Dividends (R-12/10) 
Sch. M   Other Additions and Subtractions (for businesses) (R-12/10) 
Sch. NB   Nonbusiness Income R-(R-12/10) 
Sch. NLD   Illinois Net Loss Deduction (R-12/10) 
Sch. SA   Specific Accounting Method of Computing Net Income for Corporations (N-02/11) 
Sch. UB Instr. Combined Apportionment for Unitary Business Group (R-12/10) 

Sch. UB/INS

  Tax for a Unitary Business Group with Foreign Insurer Members (R-12/10)
Sch. UB/NLD   Unitary Illinois Net Loss Deduction (R-12/10) 
Sch. 80/20   Related Party Expenses (R-12/10) 
Sch. 1299-B   Enterprise Zone or Foreign Trade Zone (sub-zone) Subtractions (for corporations & fiduciaries) (R-12/10) 
Sch. 1299-D Instr.  Income Tax Credits (for corporations & fiduciaries) (R-12/10) 
Sch. 1299-S   Enterprise Zones, Foreign Trade Zones, and Sub-Zones (R-12/10) 
Sch. 4255   Recapture of Investment Tax Credits (R-12/10) 
 
 
Answer Center
 
 
Quick Links
 
 
 
 
Information For
 
 
 
 
About IDOR