Personal Tax Information:

If you were approved for a federal tax extension and have no tax balance due, the State of Connecticut will automatically grant you a 6 month tax extension.

If you need to make a state tax payment or if you were not approved for a federal extension, you need to submit Connecticut Form CT-1040 EXT (PDF).

Filing for a Connecticut tax extension will not give you extra time to pay any tax balance due. Your balance due must be paid by April 15 to avoid possible penalties. You may qualify for a six-month extension of time to pay your tax, to request this extension, you must file Form CT-1127 (PDF), Application for Extension of Time for Payment of Income Tax, with your timely filed Connecticut income tax return or extension.

If you already received an approval notification from ExpressExtension, and you don't need to make a tax payment, then you're all done.

For more information, visit the State of Connecticut Department of Revenue Services website.
https://drsindtax.ct.gov/AUT/welcomeindividual.aspx

Business Tax Information:

The State of Connecticut requires you to file for a business state income tax extension, whether you owe state income taxes or expect a refund. If the form is completed accurately and turned in on time, and your taxes are paid by the deadline, you'll be granted a six month tax extension. If you were not approved for a federal extension you'll need to give a reason for requesting a state extension.

Filing a Connecticut tax extension does not grant you extra time to pay any tax balance due. Your balance must be paid by your original tax deadline to avoid possible penalty.

For more information, visit the State of Connecticut Department of Revenue Services website.
http://www.ct.gov/drs/cwp/view.asp?a=1433&Q=427542