An Overview of Indiana State Personal Income Tax Extension Forms

- Updated March 24, 2021 - 8.00 AM by Admin, ExpressExtension

Does Indiana support tax extension for personal income tax returns?


Yes, The state of Indiana requires individuals to file a Federal Form 4868 rather than requesting a separate state tax extension.

In case the federal tax extension Form 4868 was rejected, then the individuals can file State Tax extension Form IT-9.

What Form does the state of Indiana require to apply for an extension?


Individuals in Indiana need to file Form IT-9 with the state to get a 6-month extension of time to file their personal income tax returns Form IT-40, with the state.

  • Form IT-9- Request For Extension Of Time For Filing Individual Tax Returns

Note: Make sure to pay any taxes due along with the extension Form to avoid penalties and interest.

When is the deadline to file Form IT-9 with the state of Indiana?


Indiana State individual tax extension Form IT-9 must be filed on or before the 15th day of the 4th month after the tax year ends (April 15 for calendar year filers).

How do I pay my balance due along with the extension Form?


If you owe Indiana state taxes, you must pay the tax due by the regular due date. If not, penalties and interest will be charged.

Use Form IT-9, Extension form, to mail in a check or money order.

You can also pay the tax due online using or mailing your Form.

Mailing Address for filing Extension with the State


Where do I mail the extension Form IT-9?

Indiana Department of Revenue
P.O. Box 6117
Indianapolis, IN 46206-6117

Where do I mail the payment Form IT-40?

Indiana Department of Revenue
P.O. Box 40
Indianapolis, IN 46206-0040