Despite Tuesday's storm, DRS employees are answering emails and phone calls, and completing other essential agency functions. If you have a question about state taxes administered by DRS, email ( or call us (860-297-5962) during regular business hours. Phone wait times are minimal.

Walk-in services at all DRS branch office locations remain suspended.

Email the Priority One Taxpayer Assistance Program:

Please check our Frequently Asked Questions page.

Pass-Through Entity Tax Forms

Name Description Revised Date
CT-1065/CT-1120 SI 2019 Connecticut Pass-Through Entity Tax Instructions- INSTRUCTION BOOKLET 11/2019
CT-1065/CT-1120SI 2019 Connecticut Pass-Through Entity Tax Return 02/2020
Supplemental Attachment 2019 CT-1065/CT-1120SI Supplemental Attachment 11/2019
CT-1065/CT-1120SI EXT 2019 Application for Extension of Time to File Connecticut Pass-Through Entity Tax Return 12/2019
Schedule CT K-1 2019 Member's Share of Certain Connecticut Items 11/2019
CT-1065/CT-1120 SI ES- (Coupon) 2020 Estimated Connecticut Pass-Through Entity Tax - (Fillable) 01/2019
Schedule CT-CE Combined Election 11/2019
Schedule CT-CE Supplemental Combined Election Supplemental Attachment 11/2019
Schedule CT-AB Alternative Base Calculation
Schedule CT-AB Supplemental Alternative Base Calculation Supplemental Attachment 11/2019
Schedule CT-NR Elective Composite Income Tax Remittance Calculation 11/2019
Schedule CT-NR Supplemental Elective Composite Income Tax Remittance Calculation Supplemental Attachment 11/2019
Worksheet CT-2210 PE Underpayment of Estimated Income Tax by Pass-Through Entities