How to File an Amended Indiana Tax Return

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What Is the Indiana Definition of a Tax Amendment?

If you have already filed a tax return for a particular year but need to correct it then you should file a tax amendment form. You can correct your reported income or your claimed deductions and credits. You can't change your filing status though, it stays the same after the original return has been filed. 

How to file a tax amendment in Indiana

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You can file your Indiana state tax amendment for either the current or previous Tax Year(s) with the help of an efile TaxPro! Enjoy all the benefits of working with a TaxPro, including:

  • You can get answers to your tax questions from a licensed tax professional!
  • Enjoy the peace of mind that your IN amended tax return is being prepared and filed by a professional!

More information on how to allow an efile TaxPro prepare and file your IN state amended tax return!

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The price of having your tax amendment prepared and filed by an online TaxPro starts at only $ 49.90!

You can also download, fill out, and mail your tax amendment.

Indiana State Tax Amendment Forms (download, print out, fill out, and mail)

Complete Form IT-40X with information from your originally filed and accepted Indiana state tax return. 

Form IT-40X Indiana Amended Individual Income Tax Return

Penalties, Interest, and Fees

In Indiana the penalty for underpaying a tax is 10% of the tax underpaid and is assessed at each installment.

The state of Indiana charges interest on delinquency payments and also computes interest on overpayments of tax.

Interest Rates on Overpayments and Delinquent Taxes Owed

YearOverpayment Interest rateDelinquency Interest Rate
1950-1977 6% 6%
1978-1980 8% 8%
1981 12% 12%
1982 17% 17%
1983 13% 13%
1984-1985 12% 12%
1986 10% 10%
1987 8% 8%
1988 9% 9%
1989-1991 10% 10%
1992 8% 8%
1993-1994 7% 7%
1995 4% 6%
1996-2000 5% 7%
2001-2002 6% 8%
2003 4% 6%
2004 2% 4%
2005 1% 3%
2006 2% 4%
2007 3% 5%
2007 5% 5%
2008 7% 7%
2009 7% 7%
2010 4% 4%
2011 9% 9%
2012 4% 4%
2013 3% 3%

Where to mail your tax amendment -  Indiana Mailing Address:

Indiana Department of Revenue
100 North Senate Ave.
Indianapolis, IN 46204-2253


Learn how to amend an IRS tax return.

More information on IN state taxes.

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