Connecticut

State of Connecticut Personal Income Tax Extensions

E-file an IRS personal tax extension with TaxExtension.com

General Instructions

Connecticut personal income tax returns are due by April 15. If you cannot file on time, you can request a state tax extension. A Connecticut extension will give you 6 extra months to file your return, moving the deadline to October 15.

A Connecticut tax extension can be filed electronically or by paper. Either way, your extension request must be submitted by the original filing deadline (April 15). Use Form CT-1040 EXT (Application for Extension of Time to File Connecticut Income Tax Return for Individuals) to apply for a Connecticut tax extension by paper. Or visit the Connecticut Taxpayer Service Center (TSC) to file an extension online via WebFile: www.ct.gov/drs/TSC

Note that an extension does not give you extra time to pay your state income tax. Your Connecticut tax liability must be paid by the original deadline of your return (April 15) to avoid penalty charges. You can make a state tax payment electronically using Connecticut’s TSC (see above link), or you can mail a tax payment with Form CT-1040 EXT.

If you have a valid Federal tax extension (IRS Form 4868), you do not need to provide a reason for requesting a Connecticut tax extension. On the other hand, if you do not have a Federal extension, you will need to provide good cause for your Connecticut extension request on Form CT-1040 EXT.

If you have a valid Federal extension and you owe zero Connecticut income tax, you do not need to file a state extension (Form CT-1040 EXT). In this case, your IRS-approved Federal extension is enough to fulfill Connecticut’s requirements.

For more information, please visit the Connecticut Department of Revenue Services website: www.ct.gov/drs

Connecticut State Income Tax Payment Forms

Form CT-1040 EXT (Application for Extension of Time to File Connecticut Income Tax Return for Individuals):

Mail Form CT-1040 EXT with payment to the following address:

Department of Revenue Services
P.O. Box 2977
Hartford, CT  06104-2977

Mail Form CT-1040 EXT without payment to the following address:

Department of Revenue Services
P.O. Box 2976
Hartford, CT  06104-2976