If you discover an error on your previously filed Ohio return, use Form IT-1040 to file an amended return. This applies for both the 2024 and past tax years. However, note that Form IT-1040 is specific to Ohio and cannot be used for federal tax amendments. For federal errors, please refer to IRS Form 1040X.
To amend a return, file Form 1040-X, Amended U.S. Individual Income Tax Return. You can use tax software to electronically file your 1040-X online. Submit all the same forms and schedules as you did when you filed your original Form 1040 even if you don't have adjustments on them.
Taxpayers may need to file an amended return if they filed with missing or incorrect info. If they receive the missing or corrected Form W-2 or Form 1099-R after filing their return and the information differs from their previous estimate, they must file Form 1040-X, Amended U.S. Individual Income Tax Return.
You should consider filing an amended tax return if there is a change in your filing status, income, deductions or credits. Normally you do not need to file an amended return to correct math errors. The IRS will automatically make those changes for you.
Allow 8 to 12 weeks for your amended return to be processed; however, in some cases, processing can take up to 16 weeks. For current processing status, check our processing status dashboard.
3. Structure Your Letter Properly Your name, address, and contact information. A statement expressing your desire to appeal the IRS's findings. The tax period(s) in question. A list of the items you disagree with and why. Facts supporting your position. Any relevant law or authority supporting your case.
When requesting abatement of penalties for reasonable cause, your statement should include supporting documentation and address the following items: The reason the penalty was charged. The daily delinquency penalty may be charged for either a late filed return, an incomplete return, or both.
If you need to make a change or adjustment on a return already filed, you can file an amended return. Use Form 1040-X, Amended U.S. Individual Income Tax Return, and follow the instructions.
Option 1: Sign into your eFile account, modify your Return and download/print your IT-1040 under My Account. Check off the space next to "Check here if this is an amended return. Include the Ohio IT RE (do NOT include a copy of the previously filed return)." to indicate that it's an amended return.
Use Form 1040-X, Amended U.S. Individual Income Tax Return, and follow the instructions. You should amend your return if you reported certain items incorrectly on the original return, such as filing status, dependents, total income, deductions or credits.