Connecticut State Department of Revenue Services

Individual Income Tax Filers:  DRS will be holding a webinar on Wednesday, April 2, at 10:00 a.m.  This session will provide information for filing 2024 Connecticut income tax returns and helpful tips for electronically filing such returns. Select here to register.

New Businesses:  DRS will be holding a webinar on Wednesday, April 16, at 10:00 a.m. This session will provide an overview of the requirements for registering a new business with DRS. Select here to register.

2015 Composite Income Tax

Name

Description

Revised
Date

Due
Date

CT-1065/CT-1120 SI

2015 Connecticut Composite Income Tax Return - BOOKLET

01/2016

CT-1065/CT-1120SI

2015 Connecticut Composite Income Tax Return

01/2016

Supplemental Attachment

2015 CT-1065/CT-1120SI Supplemental Attachment

01/2016

CT-K-1T

2015 Transmittal of Schedule CT-K-1, Member's Share of Certain Connecticut Items

12/2015

Schedule CT K-1

2015 Member's Share of Certain Connecticut Items

12/2015