Connecticut State Department of Revenue Services

Walk-in services at all DRS branch office locations remain suspended. Email DRS at drs@po.state.ct.us. Email the Priority One Taxpayer Assistance Program: DRSPriorityOne_CollectionsAssist@po.state.ct.us. Please check our Frequently Asked Questions page.

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