Connecticut Income Tax Extension

Option 1: If you do not owe Connecticut income taxes or expect a CT tax refund by the tax deadline, you do not have to prepare and file a CT tax extension. In case you expect a CT tax refund, you will need to file or e-File your CT tax return in order to receive your tax refund money.

Option 2: eFiled a Federal Extension? If you do not owe Connecticut income taxes or expect a tax refund by the tax deadline, your accepted federal extension will be honored as a state extension, and you do not have to mail in Form CT-1040 EXT.

Option 1: Pay all or some of your Connecticut income taxes online via: CT TSC-IND.

Option 2: If you owe CT income taxes, you will either have to submit a CT tax return or extension by the tax deadline in order to avoid late filing penalties. You can only eFile and IRS tax extension, but not a Connecticut extension. The tax extension will only avoid late filing penalties until the October deadline.
Note: Unless you pay all your Taxes or eFile your tax return by the October deadline, the late filing penalties will start again after that deadline.

Option 3: Complete Form CT-1040 EXT, include a Check or Money Order, and mail both to the address on Form CT-1040 EXT. Important: Even if you filed an extension, you will still need to file your CT tax return either via eFile or by paper by the October deadline.

All Connecticut Tax Income Tax Return Deadlines

Important: If you owe Connecticut and/or IRS income taxes and do not file an IRS and Connecticut tax return or extension by the Tax Due Date, you will be subject to IRS and CT late filing penalties. Estimate IRS late filing, payment penalties. In addition, if you do not pay your taxes by the Tax deadline, you will be subject to late tax payment penalties. Filing an extension on time will ONLY eliminate the late filing penalties but not the late tax payment penalties. Late filing penalties are generally higher than late payment penalties, thus file something on time even if you can't pay anything on time!

e-File a Tax Extension for free on eFile.com. Here are instructions on whether you should consider a Tax Extension or not.

Discuss your extension questions and goals with a Taxpert for free and we will guide you through the process.