Electronic Filing Information for the Tax Preparers
The Modernized e-File Federal/State Filing Program (MeF) enables you to file your clients' federal and Connecticut Personal Income Tax, Income Tax for Trusts and Estates, Pass-Through Entity Tax or Corporation returns in one single transmission.
MeF is open to those tax preparers and transmitters who have been accepted by the (IRS) into the federal electronic filing program. Once the IRS accepts you into the e-file program, you are automatically enrolled in Connecticut and eligible to e-file Connecticut returns. All participants must use software approved for Connecticut electronic filing and follow the guidelines outlined in the Federal/State Electronic Filing Handbook.
Connecticut will allow three years of tax returns (Current Year plus the two immediate prior year returns) on a rolling calendar basis to be processed through MeF. This applies to Individual Income Tax, Corporation Business Tax and Pass-Through Entity Tax Returns).
Tax return preparers who prepared 50 or more Connecticut personal income tax returns are required to file all Connecticut personal income tax returns electronically. For more information, see Updated e-file Requirements for Personal Income Tax Returns.
Connecticut accepts the following returns through MeF:
NOTE:Please check with your software provider for availability, details, and support.
- Form CT-1040 Connecticut Resident Income Tax Return,
- Form CT-1040 Connecticut Nonresident and Part-Year Resident Income Tax Return,
Form CT-1040ES Estimated Connecticut Income Tax Payment Coupon for Individuals,
Form CT-1040 EXT, Application for Extension of Time to File Connecticut Income Tax Return for Individuals,
Form CT-1041, Connecticut Income Tax Return for Trusts and Estates
Form CT-1041ES, Estimated Connecticut Income Tax Payment Coupons for Trusts and Estates,
Form CT-1041 EXT, Application for Extension of Time to File Connecticut Income Tax Return for Trusts and Estates,
Form CT-1065/CT-1120SI, Connecticut Pass-Through Entity Tax Return,
Form CT-1065/CT-1120SI ES, Estimated Connecticut Pass-Through Entity Tax Payment Coupon,
Form CT-1065/CT-1120SI EXT, Application for Extension of Time to File Connecticut Pass-Through Entity Tax Return,
Form CT-1120, Corporation Business Tax Return,
- Form CT-1120 ES, Estimated Connecticut Corporation Business Tax Payment,
- Form CT-1120 EXT, Application for Extension of Time to File Connecticut Corporation Business Tax Return,
- Form CT-1120CU, Combined Unitary Corporation Business Tax Return
The IRS has several signature options available. DRS accepts these as the electronic signature for the Connecticut tax return.
The taxpayer is not required to mail any documentation to DRS but must retain required documentation for at least three years, to be provided to DRS only upon request.
For additional information regarding e-file, see the