Connecticut DRS Form Instructions
- ct-1040 Instructions for Form CT-1040 — Connecticut Resident Income Tax Return
- ct-1040-nrpy Instructions for Form CT-1040NR/PY — Nonresident & Part-Year Resident Income Tax Return
- ct-1041 Instructions for Form CT-1041 — Connecticut Income Tax Return for Trusts and Estates
- ct-1065-ct-1120si Instructions for Form CT-1065/CT-1120SI — Connecticut Composite Income Tax Return
- ct-1120 Instructions for Form CT-1120 — Corporation Business Tax Return
- ct-1120-att Form CT-1120 ATT — Corporation Business Tax Attachment Schedules
- ct-1120a Form CT-1120A — Apportionment Computation
- ct-1120cu Instructions for Form CT-1120CU — Combined Unitary Corporation Business Tax Return
- ct-1120i Form CT-1120I — Computation of Interest Due on Underpayment
- ct-941 Form CT-941 — Connecticut Quarterly Reconciliation of Withholding
- ct-pet Instructions for Form CT-PET — Pass-Through Entity Tax Return
- o-88 Form O-88 — Instructions for Form OS-114 (Sales and Use Tax)
- os-114 Form OS-114 — Connecticut Sales and Use Tax Return
- schedule-ct-k-1 Schedule CT K-1 — Member's Share of Connecticut Income, Credits, and Deductions
- schedule-ct-pe Schedule CT-PE — Pass-Through Entity Tax Credit