CT CT-1065/CT-1120SI Information
A corporation that elects S corporation status for federal income tax purposes must also file as an S corporation for Connecticut income tax purposes. For tax periods beginning on or after January 1, 2014 Composite Income Tax Returns MUST be electronically filed through the TAXPAYER SERVICE CENTER - TSC www.ct.gov/DRS/TSC
Link to official form info: Connecticut CT-1065/CT-1120SI
Link to official form info for CT-1065/CT-1120SI
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- Monday Mar 17, 2025
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10 Connecticut Tax Filings & Forms:
CT-1120 - Corporation Business Tax Return CT-1040 - Resident Income Tax Return CT-1040NR/PY - Nonresident and Part-Year Resident Income Tax Return CT-1065/CT-1120SI - Composite Income Tax Return (S Corp) CT-941 - Quarterly Reconciliation of Withholding Form CT-W3 - Annual Reconciliation of Withholding UC-2 - Employer Contribution Return CT-WH - Withholding Tax Payment Form OS-114 - Sales and Use Tax Return OS-114 - Sales and Use Tax ReturnAre we missing a Connecticut tax form?
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