Prior Year's Corporation Forms
Instructions
| Name | Description | Revised Date |
| CT-1120 |
2024 Connecticut Corporation Business Tax Instructions | 12/2024 |
Business Tax Returns
| Name | Description | Revised Date |
| CT-1120 | 2024 Corporation Business Tax Return | 12/2024 |
| CT-1120A | Corporation Business Tax Return Apportionment Computation (with instructions) | 12/2024 |
| CT-1120 ATT | Corporation Business Tax Return Attachment Schedules H, I, and J (with instructions) | 12/2024 |
| CT-1120AB | Add Back and Exceptions to Add Back of Interest and Intangible Expenses | 12/2016 |
| CT-1120K | Business Tax Credit Summary | 12/2024 |
| CT-1120I | Computation of Interest Due on Underpayment of Estimated Tax (with instructions) | 12/2024 |
| CT-1120 EXT | Application for Extension of Time to File Corporation Business Tax Return (with instructions) | 12/2024 |
| CT-1120 ES | 2025 Estimated Corporation Business Tax Payment Coupons | 12/2024 |
| CT-1120 ES | 2024 Estimated Corporation Business Tax Payment Coupons | 12/2023 |
| CT-1120 CU INSTRUCTIONS | 2024 Combined Unitary Corporation Business Tax Instructions | 12/2024 |
| CT-1120 CU | 2024 Combined Unitary Corporation Business Tax Return | 12/2024 |
| CT-1120A-CU | 2024 Apportionment Computation for Combined Unitary Filers | 12/2024 |
| CT-1120CU-NI | 2024 Tax on Combined Group Net Income | 12/2024 |
| CT-1120CU-MTB | 2024 Tax on Combined Group Minimum Tax Base | 12/2024 |
| CT-1120CU-MI | 2024 Combined Group Member Information | 12/2024 |
| CT-1120CU-NCB | 2024 Nexus Combined Base Tax Calculation | 12/2024 |
| CT-DTLD | Statement of Net Deferred Tax Liability Deduction | 12/2024 |
Other Corporation Forms
| Name |
Description |
Revised Date |
| AU-796 |
Reinstatement Guarantee Declaration for Non-stock Corporations | 03/2008 |
| AU-797 |
Dissolution Guarantee Declaration for Stock Corporations | 07/2021 |
| AU-800a | Withdrawal Guarantee Declaration for Corporations | 03/2008 |
| AU-801 |
Reinstatement Guarantee Declaration for Stock Corporations | 03/2008 |
| CT-1120A-A |
Corporation Business Tax Return Apportionment Computation-Air Carriers | 03/2017 |
| CT-1120 A-BMC |
Corporation Business Tax Return Apportionment Computation - Motor Bus and Motor Carrier Companies | 12/2016 |
| CT-1120 A-BPE |
Corporation Business Tax Return Apportionment Computation - Broadcasters and Production Entities | 12/2016 |
| CT-1120 A-CCA |
Corporation Business Tax Return Apportionment Computation of Income from Credit Card Activities | 12/2016 |
| CT-1120 A-FS |
Corporation Business Tax Return Apportionment Computation of Income from Financial Service Companies Activities | 12/2017 |
| CT-1120 A-IRIC |
Corporation Business Tax Return Apportionment Computation of Income from Services to Regulated Investment Companies | 12/2016 |
| CT-1120 A-LP |
Corporation Business Tax Return Apportionment of Limited Partnership Interests | 12/2017 |
| CT-1120 A-SBC |
Corporation Business Tax Return Apportionment Computation - Securities Brokerage Services | 12/2016 |
| CT-1120 PIC |
Information Return for Passive Investment Companies | 12/2018 |
Credit Forms
| Name |
Description | Revised Date |
| CT-YDOC | Youth Development Organization Contribution Tax Credit | NEW |
| CT-1120 AAC | ABLE Account Contribution Tax Credit | NEW |
| CT-1120AT | Apprenticeship Training Tax Credit | 12/2024 |
| CT-1120ATP | Accredited Theater Production Tax Credit | NEW |
| CT-1120 DA |
Digital Animation Tax Credit |
12/2024 |
| CT-1120 DL |
Donation of Land Credit |
12/2024 |
| CT-1120 EDPC |
Electronic Data Processing Equipment Property Tax Credit |
12/2024 |
| CT-1120 FCIC |
Fixed Capital Investment Credit |
12/2024 |
| CT-1120 FP |
Film Production Tax Credit |
12/2024 |
| CT-1120 FPI |
Film Production Infrastructure Tax Credit |
12/2024 |
| CT-1120 GB | Green Building Tax Credit | 12/2024 |
| CT-1120 HCIC |
Human Capital Investment Credit CORRECTION ALERT |
01/2025 |
| CT-1120 HH | Historic Homes Rehabilitation Tax Credit | 12/2024 |
| CT-1120 HP | Historic Preservation Tax Credit | 12/2024 |
| CT-1120 HPC | Housing Program Contribution Credit | 12/2024 |
| CT-1120 HR | Historic Rehabilitation Tax Credit | 12/2024 |
| CT-1120 HS | Historic Structures Rehabilitation Tax Credit | 12/2024 |
| CT-IRF | Insurance Reinvestment Fund Credit | 12/2024 |
| CT-1120 MEC | Machinery and Equipment Expenditure Credit | 12/2024 |
| CT-1120 PE | Pass-Through Entity Tax Credit | 12/2024 |
| CT-1120 RC | Research and Experimental Expenditures Credit | 12/2024 |
| CT-1120 RDC | Research and Development Credit | 12/2024 |
| CT-RSLP | Application for Refund of Student Loan Payment Tax Credits by a Qualified Small Business | 12/2024 |
| CT-1120 SF | Service Facility Credit | 12/2024 |
| Form CT-2025 SLP |
Application for Student Loan Payment Tax Credit | 02/2025 |
| CT-SLP | Student Loan Payment Tax Credit | 12/2024 |
| 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 |
12/2024 |
| CT-UISR | Urban and Industrial Site Reinvestment Credit | 12/2024 |
| CT-1120 XCH | Application for Exchange of Research and Development or Research and Experimental | 12/2024 |
| NAA-01 | 2025 Connecticut Neighborhood Assistance Act (NAA) Program Proposal -Fillable | 02/2025 |