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How do I file an amended Ohio state return?

Quick Links:

Ohio Amendment Guide on Credit Karma Tax

When do I need to file my OH amendment?

How do I file a Ohio Amended Individual Income Tax Return (Form IT-1040X)?

What should I expect when I file an amended return?

Ohio Department of Taxation Contact Information

When do I need to file my OH amendment?

If you need to make any adjustments to your Ohio state return or if the changes in your federal return affected your state return, you may need to file an amended return. You have 4 years from the original due date to file an amended Ohio income tax return when requesting a refund, or within a year of over-payment of income tax, whichever date is later.

How do I file a Ohio Amended Individual Income Tax Return (Form IT-1040X)?

Fill out the Ohio Amendment Section on Credit Karma Tax (Form IT-1040X)

You will need to print out your amended return and mail it to the Ohio Department of Taxation.

  • If payment is included:

Ohio Department of Taxation
PO Box 2057
Columbus, OH 43216-1460

(Be sure to include Voucher Form IT-40P/ IT 40XP-Amended Voucher)

  • If payment is not included :

Ohio Department of Taxation
PO Box 2679
Columbus, OH 43270-2679

What should I expect when I file an amended return?

The Ohio Department of Taxation may impose the following penalties and interest fees: 

  • Payment is due 60 days after taxpayer receives assessment of fees and penalties due.
  • When taxes due are unpaid by the tax return deadline, you may be charged $50 per month (not to exceed $500 or 5% per month up to a maximum of 50% of taxes due). 
  • If you file your return after the due date and are planning to pay after the due date, you will be required to pay interest unless your interest is greater than taxes paid after due date.
  • Interest rate is 4% on all unpaid taxes due. 
  • Interest is calculated from the due date of the original return through the actual billing date. Interest cannot be waived and is charged at the rate, per annum. For more information, refer to Ohio State FAQs here.

Ohio Department of Taxation Contact Information

You can track the process of your IT-1040X here.
You can contact the Ohio Department of Taxation by phone: 1-800-282-1780 or by email.
You can contact the Ohio Franchise Board via: live chat, postal mail, or their Contact Us page.

Still have questions? Contact member support

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