How to File an Ohio Tax Amendment

Ohio State Taxes
amend Ohio taxes

"The Buckeye State"

What Is the Ohio Definition of a Tax Amendment?

You can file an amendment within a period of 4 years since the original due date of the tax return. You have at least 60 days to file a return in cases when your Ohio resident credit increases or when the IRS changes your income and you get a refund check.

How Do I Correct My Accepted Ohio Tax Return for File an Amended Ohio Tax Return?

You must file an Ohio tax amendment if there was a change in income, deductions or tax credits in your original, accepted Ohio tax return.

You can change your filing status from married and filing separately to married and filing jointly, but you can't change your status from married and filing jointly to married and filing separately.

Follow these instructions on how to amend your Ohio tax return: 

  1. Download and complete Form IT-1040 for the appropriate Tax Year (or IT-140X for 2014 and earlier Tax Years). 
  2. Print out the form and mail it to: Ohio Department of Taxation, P.O. Box 1460, Columbus, OH 43216-1460

Ohio State Tax Amendment Form (Download, Fill Out, Print, and Mail)

For 2015 and later Tax Years, complete Form IT-1040 and check the box to indicate that it's an amended tax return.

For Tax Years 2014 and earlier, fill out Form IT-140X.

Form (Tax Year) Description
IT-1040 (2018) Ohio Individual Income Tax Form
IT-1040 (2017) Ohio Individual Income Tax Form
IT-1040 (2016) Ohio Individual Income Tax Form
IT-1040 (2015) Ohio Individual Income Tax Form
IT-140X (2014 and earlier Tax Years) Ohio Amended Income Tax Form

How Do I Check My Ohio State Amended Tax Return Status?

You can call the Ohio Department of Revenue at (800) 282-1780.

What Are the Penalties, Interest, and Fees Associated with Ohio Tax Amendments?

Ohio charges interest on unpaid taxes. The rate is determined by the Ohio Tax Commissioner October 15 of every year, and is usually the federal interest rate plus 3% added to it.

Annual Certified Interest Rates in the State of Ohio

Year Annual Interest Rate Monthly Interest Rate
2019 5% 0.42%
2018 4% 0.33%
2017 4% 0.33%
2016 3% 0.25%
2015 3% 0.25%
2014 3% 0.25%
2013 3% 0.25%
2012 3% 0.25%

This formula is used to calculate the interest rate:

(Tax Due x Interest Rate x Number of Days the Tax Was Late)/Number of Days in a Year

Where Do I Mail My Amended Ohio Tax Return? - Ohio Mailing Address:

Ohio Department of Taxation
P.O. Box 1460
Columbus, OH 43216-1460

Ohio Department of Revenue Phone Number: (800) 282-1780

Ohio Department of Revenue

Where Do I Find More Ohio State Tax Information?

How Do I File My Ohio Tax Return Only?

Where is my Ohio State Tax Refund?

Ohio Tax Extension

Ohio State Income Taxes

What If I Need to Fix My Accepted Federal Tax Return?

Learn how to amend your IRS taxes.