- Do you owe back taxes? The 2021 CT Tax Amnesty Program offers a limited opportunity to make it right. Click here for more information.


- If you filed 2020 Schedule CT-EITC, Connecticut Earned Income Tax Credit along with your 2020 Form CT-1040, Connecticut Income Tax Return, on or

before December 31, 2021, you may be eligible for the 2020 EITC Enhancement Program, click here for more information.


- DRS is hiring Accounting Careers Trainee - learn about these positions at Accounting Careers Trainee Informational Page

- Sales tax relief for sellers of meals: Click here for updated information

- Learn more about myconneCT

2021/2022 Forms will continue to be added as they are approved.
If the form is not linked it is not yet available.

Booklet

Name Description Revised Date Due Date
 CT-1120
  2021 Connecticut Corporation Business Tax Instructions 12/2021 N/A 

Business Tax Returns

Name Description Revised Date Due Date
CT-1120 2021 Corporation Business Tax Return 12/2021
CT-1120A Corporation Business Tax Return Apportionment Computation (with instructions) 12/2021
CT-1120 ATT Corporation Business Tax Return Attachment Schedules H, I, and J (with instructions) 12/2021
CT-1120AB Add Back and Exceptions to Add Back of Interest and Intangible Expenses 12/2016
CT-1120K Business Tax Credit Summary 12/2021
CT-1120I Computation of Interest Due on Underpayment of Estimated Tax (with instructions) 12/2021
CT-1120 EXT Application for Extension of Time to File Corporation Business Tax Return (with instructions) 12/2021
CT-1120 ES 2021 Estimated Corporation Business Tax Payment Coupons 12/2020
CT-1120 ES 2022 Estimated Corporation Business Tax Payment Coupons 12/2021
CT-1120 CU BOOKLET 2021 Combined Unitary Corporation Business Tax Booklet 12/2021
CT-1120 CU 2021 Combined Unitary Corporation Business Tax Return 12/2021
CT-1120A-CU 2021 Apportionment Computation for Combined Unitary Filers 12/2021
CT-1120CU-NI 2021 Tax on Combined Group Net Income 12/2021
CT-1120CU-MTB 2021 Tax on Combined Group Minimum Tax Base 12/2021
CT-1120CU-MI 2021 Combined Group Member Information 12/2021
CT-1120CU-NCB 2021 Nexus Combined Base Tax Calculation 12/2021

Other Corporation Forms

Name Description Revised Date Due Date
AU-796 Reinstatement Guarantee Declaration for Non-stock Corporations 03/2008 N/A
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-8822C Corporation Business Tax Change of Address 01/2018
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-1120AT  Apprenticeship Training Tax Credit 12/2021
 CT-1120 DA
 Digital Animation Tax Credit
12/2021
 CT-1120 DL
 Donation of Land Credit
12/2021
 CT-1120 EDPC
 Electronic Data Processing Equipment Property Tax Credit
12/2021
 CT-1120 FCIC
 Fixed Capital Investment Credit
12/2021
 CT-1120 FP
 Film Production Tax Credit
12/2021
 CT-1120 FPI
 Film Production Infrastructure Tax Credit
12/2021
 CT-1120 GB  Green Building Tax Credit 12/2021
 CT-1120 HCIC  Human Capital Investment Credit 12/2021
 CT-1120 HH  Historic Homes Rehabilitation Tax Credit 12/2021
 CT-1120 HP  Historic Preservation Tax Credit 12/2021
 CT-1120 HPC  Housing Program Contribution Credit 12/2021
 CT-1120 HR  Historic Rehabilitation Tax Credit 12/2021
 CT-1120 HS  Historic Structures Rehabilitation Tax Credit 12/2021
 CT-IRF  Insurance Reinvestment Fund Credit 12/2021
 CT-1120 MEC  Machinery and Equipment Expenditure Credit 12/2021
 CT-1120 PE  Pass-Through Entity Tax Credit 12/2021
 CT-1120 RC  Research and Experimental Expenditures Credit 12/2021
 CT-1120 RDC  Research and Development Credit 12/2021
 CT-1120 SF  Service Facility Credit 12/2021
 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
12/2021
 CT-UISR  Urban and Industrial Site Reinvestment Credit 12/2021
 CT-1120 XCH  Application for Exchange of Research and Development or Research and Experimental 12/2021
 NAA-01  2021 Connecticut Neighborhood Assistance Act (NAA) Program Proposal -Fillable 02/2021