What do I need to do to make a correction to a tax return that has been filed?
You will need to file an amended return. Quarterly taxpayers will be required to file an amended return via the Ohio Business Gateway (business.ohio.gov). For annual taxpayers this return will be available on our Web site at Tax Forms. You should select the annual return that corresponds to the tax year that you wish to amend. There is a box that you may check on each annual return to indicate if a return is being amended. Additionally, returns may be requested by calling 1-888-722-8829.