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Department of Taxation and Finance

Apply for an extension of time to file an income tax return

If you cannot file on time, you can request an automatic extension of time to file the following forms.

  • Form IT-201, Resident Income Tax Return
  • Form IT-203, Nonresident and Part-Year Resident Income Tax Return
  • Form IT-204, Partnership Return
  • Form IT-205, Fiduciary Income Tax Return

When to file

You must file your extension request on or before the filing deadline of your return.

Special filing deadlines
FilerReturn2017 Filing Deadline for Calendar Year FilersLength of ExtensionExtended Due Date
Individual Form IT-201 or IT-203 April 17, 2018 6 months October 15, 2018
Partnership Form IT-204 March 15, 2018*  6 months  September 17, 2018
Fiduciaries Form IT-205 April 17, 2018 5 1/2 months  October 1, 2018

*Calendar year partnership filers can no longer request a 2017 extension since the filing deadline has passed.

There are special filing deadlines in certain instances.

An extension request filed after the filing deadline for your return will be invalid.

How to request your extension

  • You can complete your request for free using our online service.
  • You must e-file your extension if you prepare your extension using software that supports e-file.
  • If your paid preparer is required to e-file your tax return, and is also preparing your extension request, the preparer must e-file your extension request.

The online and e-file options provide you with a confirmation that we received your extension request.

Fiscal year filers should contact us to request an extension.

Payment of tax

You must make full payment of the properly estimated tax balance due when you request your extension of time to file. 


Form IT-370-PF, Application for Automatic Extension of Time to File for Partnerships and Fiduciaries