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 |