Connecticut State Department of Revenue Services

Individual Income Tax Filers:  DRS will be holding a webinar on Thursday, March 20, at 10:00 a.m.  This session will provide information for filing 2024 Connecticut income tax returns and helpful tips for electronically filing your Connecticut income tax return.  Select here to register.

 

2017 Composite Income Tax

Name

  Description

Revised
Date

CT-1065/CT-1120 SI

2017 Connecticut Composite Income Tax - INSTRUCTION BOOKLET

12/2017

CT-1065/CT-1120SI

2017 Connecticut Composite Income Tax Return

12/2017

Supplemental Attachment

2017 CT-1065/CT-1120SI Supplemental Attachment

12/2017

CT-1065/CT-1120SI EXT

2017 Application for Extension of Time to File Connecticut Composite Income Tax Return

12/2017

CT-K-1T

2017 Transmittal of Schedule CT-K-1, Member's Share of Certain Connecticut Items

12/2017

Schedule CT K-1

2017 Member's Share of Certain Connecticut Items

12/2017

CT-AIT

Angel Investor Tax Credit

02/2017
SN 2018(4) Guidance on 2018 Estimated Payments for the Newly Enacted Pass-Through Entity Tax
N/A

CT-1065/CT-1120 SI ES - (COUPON)

2018 Estimated Connecticut Pass-Through Entity Tax - (Fillable)

06/2018