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2020 Corporation Tax Forms

Booklet

Name Description
CT-1120
 2020 Connecticut Corporation Business Tax Instructions

Business Tax Returns

Name Description
CT-1120 2020 Corporation Business Tax Return
CT-1120A Corporation Business Tax Return Apportionment Computation (with instructions)
CT-1120 ATT Corporation Business Tax Return Attachment Schedules H, I, and J (with instructions)
CT-1120AB Add Back and Exceptions to Add Back of Interest and Intangible Expenses
CT-1120K Business Tax Credit Summary
CT-1120I Computation of Interest Due on Underpayment of Estimated Tax (with instructions)
CT-1120 EXT Application for Extension of Time to File Corporation Business Tax Return (with instructions)
CT-1120 ES 2021 Estimated Corporation Business Tax Payment Coupons
CT-1120 ES 2020 Estimated Corporation Business Tax Payment Coupons
CT-1120X Amended Corporation Business Tax Return
CT-1120X Inst. Amended Corporation Business Tax Return Instructions
CT-1120 CU BOOKLET 2020 Combined Unitary Corporation Business Tax Booklet
CT-1120 CU 2020 Combined Unitary Corporation Business Tax Return
CT-1120A-CU 2020 Apportionment Computation for Combined Unitary Filers
CT-1120CU-NI 2020 Tax on Combined Group Net Income
CT-1120CU-MTB 2020 Tax on Combined Group Minimum Tax Base
CT-1120CU-MI 2020 Combined Group Member Information
CT-1120CU-NCB 2020 Nexus Combined Base Tax Calculation

Other Corporation Forms

Name Description
AU-796 Reinstatement Guarantee Declaration for Non-stock Corporations
AU-797 Dissolution Guarantee Declaration for Stock Corporations
AU-800a Withdrawal Guarantee Declaration for Corporations
AU-801 Reinstatement Guarantee Declaration for Stock Corporations
CT-1120A-A Corporation Business Tax Return Apportionment Computation-Air Carriers
CT-1120 A-BMC Corporation Business Tax Return Apportionment Computation - Motor Bus and Motor Carrier Companies
CT-1120 A-BPE Corporation Business Tax Return Apportionment Computation - Broadcasters and Production Entities
CT-1120 A-CCA Corporation Business Tax Return Apportionment Computation of Income From Credit Card Activities
CT-1120 A-FS Corporation Business Tax Return Apportionment Computation of Income from Financial Service Companies Activities
CT-1120 A-IRIC Corporation Business Tax Return Apportionment Computation of Income from Services to Regulated Investment Companies
CT-1120 A-LP Corporation Business Tax Return Apportionment of Limited Partnership Interests
CT-1120 A-SBC Corporation Business Tax Return Apportionment Computation - Securities Brokerage Services

Credit Forms

Name Description
CT-1120 AT Apprenticeship Training Tax Credit
CT-1120 DA Digital Animation Tax Credit
CT-1120 DL Donation of Land Credit
CT-1120 EDPC Electronic Data Processing Equipment Property Tax Credit
CT-1120 FCIC Fixed Capital Investment Credit
CT-1120FP Film Production Tax Credit
CT-1120 FPI Film Production Infrastructure Tax Credit
CT-1120 GB Green Building Tax Credit
CT-1120 HCIC Human Capital Investment Credit
CT-1120 HH Historic Homes Rehabilitation Tax Credit
CT-1120 HP Historic Preservation Tax Credit
CT-1120 HPC Housing Program Contribution Credit
CT-1120 HR Historic Rehabilitation Tax Credit
CT-1120 HS Historic Structures Rehabilitation Tax Credit
CT-1120 MEC Machinery and Equipment Expenditure Credit
CT-1120 PE Pass-Through Entity Tax Credit
CT-1120 RC Research and Experimental Expenditures Credit
CT-1120 RDC Research and Development Credit
CT-1120SF Service Facility Credit
CT-1120 TIC-EZ Manufacturing Facility Credit for Facilities Located in a Targeted Investment Community/Enterprise Zone NOTE: This form replaces Forms CT-1120 CRMC, CT-1120 CRMCEZ, CT-1120 MC and CT-1120 MCEZ
CT-UISR Urban and Industrial Site Reinvestment Credit
CT-1120 XCH Application for Exchange of Research and Development or Research and Experimental
NAA-01 2021 Connecticut Neighborhood Assistance Act (NAA) Program Proposal -Fillable