Indiana Income Tax Return Amendment

If you need to change or amend an accepted Indiana state income Tax Return for the 2024 to 2021 Tax Year you need to complete Form IT-40. Form IT-40X (Indiana Amended Individual Income Tax Return) is often used for tax years 2020 and earlier. Form IT-40 is a dual form used for the Tax Return and Tax Amendment. You can prepare an Indiana Tax Amendment Form for the current Tax Year (2024) on eFile.com, however you can not file it electronically, you must mail it in. For all previous IN Tax Years complete form IT-40 and IT-40X, see below by Tax Year. In comparison, the IRS requires a different Form - Form 1040X - to amend an IRS return (do not use Form 1040 for an IRS Amendment).

The IRS might send you a notification to change an error on your Return, or you might have discovered an error. If you or the IRS amended or changed one of your IRS Tax Return(s), the IRS will report this to the Indiana Tax Agency, thus you should file an Indiana Amendment within one year.

Function

Description

Indiana Tax Deadlines, Forms, Extension, Penalties

Instructions, Resources on how to prepare and e-File Indiana Tax Returns or how to prepare an Extension and/or previous Year Tax Returns

Prepare, eFile a 2024 tax year IN + IRS Tax Return: Detailed eFile.com Service Overview

Start Federal and Indiana Tax Returns

Prepare only an IN State Return

Step by step instructions on how to only Prepare - not e-File - one or more State Returns on eFile.com.

File an Indiana Tax Amendment

You can prepare an Indiana Tax Amendment for the 2024 tax year here on eFile.com; the amendment can not be e-filed. After you have prepared the amendment, download the PDF from your My Account, check the box and mail in the form to the address listed below. For other tax years complete the form below before you print, sign and mail in the form.
Option 1: Sign into your eFile.com account, modify your Return and download/print the Form IT-40 under My Account. Check the "Amended Return" box, sign the form, and mail it to one of the addresses listed below.
Option 2: If you don't have an eFile.com account follow the step by step instruction on how to prepare a tax return/amendment.
Option 3: If you want to do the math on your own paper return then complete, sign Form IT-40 Print, Mail the Form to IN State Tax Commission to:

If you are requesting a refund:
Indiana Department of Revenue
P.O. Box 40
Indianapolis, IN 46206-0040
If you are including payment:
Indiana Department of Revenue
P.O. Box 7224
Indianapolis, IN 46207-7224

IN Tax Amendment Form IT-40
This Form can be used to file a: Tax Return, Tax Amendment, Change of Address. Check the proper check box on the Form.

Step 1: Select the IN Form IT-40 by Tax Year below
Step 2: Sign and mail Form IT-40 to the address listed above.

How to correct a rejected Tax Return

If your IN Tax Return was rejected by the IN Tax Agency - not eFile.com - instructions on how to correct a rejected Indiana Tax Return.

For all Tax Years prior to the 2024 tax year Prepare, Print, Sign and Mail-In - see address above - your Tax Amendment as soon as possible. Select the appropriate form (Form IT-40) for the Tax Year you are amending. You will also file an IRS Tax Amendment Form 1040X.

Tax Year 2025 - Form IT-40
Tax Year 2024 - Form IT-40
Tax Year 2023 - Form IT-40
Tax Year 2022 - Form IT-40
Tax Year 2021 - Form IT-40
Form IT-40X - For tax years 2020 and prior

Check Your IN Tax Amendment Status

1. Call the IN Department of Revenue at (800) 457-8283.
2. Contact the IN Department of Revenue

Indiana Refund Deadlines

A. Three years from the due date of the original tax year return, including valid filing extensions.
B. One year from the final determination of the amended federal return or federal change, whichever is later, provided that the allowable refund is not more than the decrease in Indiana tax attributable to the federal change or correction.
C. Two years from the payment of an assessment, provided the amended return raises issues relating only to the prior assessment and the refund does not exceed the amount of tax paid on the prior assessment.
D. Two years from the filing of an amended Indiana return resulting in the payment of additional tax, provided that the current amended return raises issues relating solely to the prior amended return and that the refund does not exceed the amount of the tax payment made as a result of the prior amended return.
Additional Indiana Tax Income Taxes Deadlines

Indiana Income Tax Penalties

Find out how Indiana Late Filing and Late Payment Penalties are calculated.
For IRS Tax and Late Filing Penalties we have an easy to use tool: The PENALTYucator.

File an IRS Tax Amendment by Tax Year

Instructions on how to prepare an IRS Tax Amendment on eFile.com, however the IRS does not accept Tax Amendments electronically.

Will I get a bigger tax refund in 2026?

Many taxpayers can expect a bigger tax refund on their 2025 taxes. To help you keep up with soaring inflation, the IRS is making bigger changes than usual that could save you big money on your 2025 taxes, which is the tax return you'll file in 2026.

Take control of your personal life relationships, finances, and taxes: follow the tips on this page and keep up with tax planning for next year. You can use this free Tax Refund Calculator 2025 to get a high-level understanding of your taxes.

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