Holiday Closing - The Department of Revenue Services will be closed on Monday, May 27th, a state holiday.

Individual Income Tax Forms

Instruction Booklets

Name Description Revised Date Due Date

CT-1040

2021 Connecticut Resident Income Tax Instruction Booklet 12/2021 04/15/2022
CT-1040NR/PY 2021 Nonresident/Part-Year Resident Tax Instruction Booklet 12/2021 04/15/2022

Resident Form

Name

Description Revised Date Due Date
CT-1040 2021 Resident Income Tax Return 12/2021 04/15/2022

Part-Year/Nonresident Forms

Name Description Revised Date Due Date
CT-1040NR/PY 2021 Nonresident/Part-Year Resident Tax Return 12/2021 04/15/2022
Schedule CT-SI Nonresident or Part-Year Resident Schedule of Income From Connecticut Sources 12/2021 04/15/2022
Schedule CT-1040 AW Part-Year Resident Income Allocation 12/2021 04/15/2022

EITC Forms

Schedule CT-EITC 2021 Connecticut Earned Income Tax Credit 12/2021 04/15/2022

Other Forms & Schedules

CT-CWPI Request for Waiver of 2018 Penalty and Interest Due to the Enactment of the Pass-Through Entity Tax (Individuals, Trusts and Estates only) 2019
CT-1040 EXT Application for Extension of Time to File Connecticut Income Tax Return for Individuals 12/2021
Schedule CT-BIO Bioscience Worksheet 12/2021
Schedule CT-PE Pass-Through Entity Tax Credit 12/2021
Schedule
CT-IT Credit
Income Tax Credit Summary 12/2021
CT-1040BA Nonresident Business Apportionment Schedule 12/2021
CT-1040CRC Claim of Right Credit 12/2021
Schedule
CT-CHET

2021Connecticut Higher Education Trust (CHET) 529 College Savings Plan Contribution
12/2021
CT-1040EFW Connecticut Electronic Withdrawal Payment Record
12/2021
CT-1040ES 2022 Estimated Connecticut Income Tax Payment Coupon for Individuals 09/2022
CT-1040V Connecticut Electronic Filing Payment Voucher 12/2021
Schedule
CT-1040WH

Connecticut Income Tax Withholding Supplemental Schedule 12/2021
CT-1040X Amended Income Tax Return for Individuals 12/2021
CT-1127 Application for Extension of Time for Payment of Income Tax 12/2021
CT-19 IT Title 19 Status Release Form 12/2021
CT-2210 Underpayment of Estimated Income Tax by Individuals, Trusts, and Estates 12/2021
CT-3911 Taxpayer Statement Regarding Refund -Use this form to report a lost, stolen or missing refund check 12/2016
CT-4852 Substitute for Forms W-2 and 1099-R 12/2021
CT-6251 Connecticut Alternative Minimum Tax Return 12/2021
CT-8379 Nonobligated Spouse Claim 12/2021
CT-8801 Credit for Prior Year Connecticut Minimum Tax for Individuals, Trusts, and Estates 12/2021
CT-8857 Request for Innocent Spouse Relief 12/2021
CT-IRF Insurance Reinvestment Fund Credit
OP-186 Individual Use Tax Return
CT-12-717A Change of Resident Status - Special Accruals Connecticut Surety Bond Form 2017
CT-12-717B Change of Resident Status - Special Accruals Other Acceptable Security Form 2017
CT-12-717A&B Forms CT-12-717 A and CT-12-717 B Instructions 2017
Tax Tables & Calculators