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State contact information
If you have specific questions about what you can e-file or about rejections you received, contact the state for more information.
Department of Revenue Services
Help Desk
P.O. Box 2964
Hartford, CT 06104-2964
www.ct.gov/drs/
Email: CT.eFile@ct.gov
Phone: 860-297-4973 or 860-297-5979
Tax Refund Inquiries: 860-297-5962 or 800-382-9463
State electronic filing details
| Grace period | 5 days |
| E-filing mandate | You must e-file if preparing 50 or more returns. |
| Accepts state-only filings | Yes |
| Return types accepted |
Resident Part-year resident Nonresident Estimate payments (there will be a separate e-file for each estimate payment) Extension Amended (starting in tax year 2022 |
| Return types not accepted | |
| Accepts returns with these conditions |
Refund Zero balance Balance due |
| Direct deposit of refunds | Yes |
| Accepted forms of payment |
Direct debit (EFW) Credit card Online ePayment |
| Signature requirements | Completing federal Form 8879 signature requirements satisfies state requirement |
| Supports PDF attachments | No |
| Tax year(s) supported for e-filing | Current tax year and two prior tax years (except for amended returns, which aren't eligible for e-file) |
| Special considerations | See Electronic filing handbook |
State contact information
If you have specific questions about what you can e-file or about rejections you received, contact the state for more information.
Connecticut Department of Revenue Services - Electronic Commerce Unit
25 Sigourney St., Suite 2
Hartford, CT 06106-5032
www.ct.gov
Email: Jim.Annino@po.state.ct.us
Phone: 860-297-4713
State electronic filing details
| Grace period | 5 days |
| E-filing mandate | All corporate returns and their associated payments other than Form OP-424. |
| Accepts state-only filings | Yes |
| Return types accepted |
C Corporation S Corporation Consolidated / Combined Short year Estimates (filed separate from return) Extension Amended C Corporation Amended S Corporation |
| Return types not accepted |
Amended Combined |
| Accepts returns with these conditions |
Refund Zero balance Balance due |
| Direct deposit of refunds | Yes |
| Accepted forms of payment |
Direct debit (EFW) Electronic funds transfer (EFT) Check by mail (only if waiver is granted) |
| Signature requirements | None |
| Supports PDF attachments | Yes |
| Tax year(s) supported for e-filing | Current tax year and two prior tax years |
| Special considerations | Connecticut prefers that you use electronic funds withdrawal to make any payments. |
State contact information
If you have specific questions about what you can e-file or about rejections you received, contact the state for more information.
Connecticut Department of Revenue - Electronic Commerce Unit
25 Sigourney Street, Ste 2
Hartford, CT 06106
www.ct.gov/DRS/cwp/view.asp?a=1433&q=265890
Email: Jim.Annino@po.state.ct.us
Phone: 860-297-4713
State electronic filing details
| Grace period | 5 business days |
| E-filing mandate | Effective for tax periods beginning January 1, 2014, all composite income tax returns must be filed and the tax payments must be made electronically. |
| Accepts state-only filings | No |
| Return types accepted |
Partnership Short year Extensions Composite (part of main return) |
| Return types not accepted |
Amended Estimates Withholding |
| Accepts returns with these conditions |
Refund Zero balance Balance due |
| Direct deposit of refunds | Yes |
| Accepted forms of payment |
Direct debit (EFW) Credit card Electronic funds transfer (EFT) Check by mail (only if waiver granted) |
| Signature requirements | None |
| Supports PDF attachments | No |
| Tax year(s) supported for e-filing | Current tax year and two prior tax years |
| Special considerations | Only CT-1065/CT-1120SI form is allowed to be efiled. Form OP-424 must be filed on TSC unless a waiver is granted. |
State contact information
If you have specific questions about what you can e-file or about rejections you received, contact the state for more information.
Connecticut Department of Revenue - Electronic Commerce Unit
Email: ct.efile@po.state.ct.us
Phone: 860-297-4973
State electronic filing details
| Grace period | |
| E-Filing mandate | Yes |
| Accepts state-only filings | Yes |
| Return types accepted |
Resident Non-resident Estimate payments Extension |
| Return types not accepted | Amended |
| Accepts return with these conditions |
Refund Zero balance Balance due |
| Direct deposit of refunds | Yes |
| Accepted forms of payment |
Direct debit (EFW) Credit Card Online payment Check |
| Signature requirements | None |
| Supports PDF attachments | Yes |
| Special considerations | None |
State electronic filing details
Electronic filing is not available for Connecticut nonproft returns.
State contact information
Connecticut Department of Revenue
https://www.ct.gov/drs/site/default.asp
Phone number: 860-297-5962
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