Connecticut State Department of Revenue Services

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.

2015 Individual IncomeTax Forms

Instruction Booklets
 Name Description
 Revised Date
CT-1040  2015 Connecticut Resident Income Tax Instruction Booklet 03/2016
CT-1040NR/PY 2015 Nonresident/Part-Year Resident Tax Instruction Booklet 12/2015
Corrected Property Tax Tables Updated Property Tax Tables 03/2016

Forms & Instructions

Name
 Description Revised Date
CT-1040
 2015 Resident Income Tax Return
 12/2015
CT-1040NR/PY
 2015 Nonresident/Part-Year Resident Tax Return
 12/2015
Schedule
CT-SI
 Nonresident or Part-Year Resident Schedule of Income from Connecticut Sources
 12/2015
Schedule CT-EITC
 2015 Connecticut Earned Income Tax Credit
 12/2015
Schedule
CT-IT Credit
 Schedule CT-IT Credit
 12/2015
CT-1040 AW
 Part-Year Resident Income Allocation Worksheet
 12/2015
CT-1040BA
 Nonresident Business Apportionment Schedule
 12/2015
Schedule
CT-1040WH		  Connecticut Income Tax Withholding Supplemental Schedule 12/2015
Schedule
CT-CHET		  2015 Connecticut Higher Education Trust (CHET) 529 College Savings Plan Contribution 12/2015
CT-1040CRC  Claim of Right Credit 12/2015
CT-1040EFW  Connecticut Electronic Withdrawal Payment Record 12/2015
CT-1040V  Connecticut Electronic Filing Payment Voucher 12/2015
CT-1127  Application for Extension of Time for Payment of Income Tax 12/2015
CT-19 IT  Title 19 Status Release Form 12/2015 
CT-2210  Underpayment of Estimated Income Tax by Individuals, Trusts and Estates (Schedules A & B) 12/2015
CT-3911  Taxpayer Statement Regarding Refund - Use this form to report a lost, stolen or missing refund check 12/2015 
CT-4852  Substitute for Forms W-2 and 1099-R 12/2015 
CT-6251  Connecticut Alternative Minimum Tax Return 12/2015 
CT-8379  Nonobligated Spouse Claim 12/2015 
CT-8801  Credit for Prior Year Connecticut Minimum Tax for Individuals, Trusts and Estates 12/2015
CT-8857  Request for Innocent Spouse Relief 01/2015
CT-IRF  Insurance Reinvestment Fund Credit 12/2015
OP-186  Individual Use Tax Return 09/2015
CT-1040X  Amended Income Tax Return for Individuals 12/2015
CT-12-717A  Change of Resident Status - Special Accruals Connecticut Surety Bond Form 2016
CT-12-717B  Change of Resident Status - Special Accruals Other Acceptable Security Form 2016
CT-12-717A&B  Forms CT-12-717 A and CT-12-717 B Instructions 2016
 
Tax Tables & Calculators
Name Description Revised Date

2015 Tax Tables to $500K

  12/2015

2015 Tax Tables to $102K

  12/2015
Calculation Schedule  Use this schedule to calculate the tax if your a.g.i is over $102,000  12/2015
Income Tax Calculator  Use this calculator to determine your tax liability, regardless of your a.g.i.  12/2015
Property Tax Calculator  Use this calculator to determine the amount of your property tax credit  12/2015