Form CT-945 is used to reconcile annual Connecticut income tax withholding from nonpayroll amounts only.
Waiver: Only taxpayers that receive a waiver from the electronic filing requirement from DRS may file paper withholding forms.
Wage payers: Payers of wage amounts must use Form CT-941, Connecticut Quarterly Reconciliation of Withholding.
Amended returns: Do not use this form to amend a previously filed Form CT-945.
Timely deposits: A payer that has made timely deposits in full payment of the taxes for calendar year 2025 may file Form CT-945 on or before February 10, 2026.
Next business day: If the due date falls on a Saturday, Sunday, or legal holiday, the return will be considered timely if filed by the next business day.
| Question | Answer |
|---|---|
| Form Name | Form CT-945 |
| Form Length | 4 pages |
| Fillable? | No |
| Fillable fields | 0 |
| Avg. time to fill out | 12 min |
| Edition | 12/25 |
| Issuing agency | Department of Revenue Services, State of Connecticut |
| Due date | January 31, 2026 |
| Matches the agency's file | Yes, checked October 2, 2026 |
| Other names | CT-945, CT945, CT 945, Form CT-945, Connecticut CT-945, Annual Reconciliation of Withholding for Nonpayroll Amounts |
| Official source | Form CT-945 (Rev 12/25), Connecticut Department of Revenue Services |
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