Employers must file every Copy 1 of federal Form W-2 reporting Connecticut wages with Form CT-W3 even if Connecticut income tax was not withheld.
25 or more W-2s: if you file 25 or more Forms W-2 reporting Connecticut wages paid you are required to file electronically unless you have been granted a waiver
24 or fewer W-2s: if you file 24 or fewer Forms W-2 reporting Connecticut wages paid you are encouraged to file electronically but may file paper forms
Household employers: household employers do not use this form.
Payment: do not make a payment with this return.
Where to mail: Department of Revenue Services State of Connecticut PO Box 2930 Hartford, CT 06104-2930
| Question | Answer |
|---|---|
| Form Name | Form CT-W3 |
| Form Length | 2 pages |
| Fillable? | Yes |
| Fillable fields | 23 |
| Avg. time to fill out | 4 min |
| Edition | Rev. 12/25 |
| Issuing agency | Department of Revenue Services, State of Connecticut |
| Other names | CT-W3, CTW3, CT W3, Form CT-W3, Connecticut Annual Reconciliation of Withholding |
| Official source | Form CT-W3 (Rev 12/25), Connecticut Department of Revenue Services |
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