DRS will be holding a webinar on Wednesday, May 14, 2025, at 10:00 a.m.  This session will provide an overview of the sales and use tax requirements pertaining to swimming pool installation, repair, cleaning and maintenance services.  Select here to register.

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