How many years should I keep my Ohio individual income tax records?

If you're paying state income taxes, the time you need to keep records will depend on state law.Some states can look back further than the IRS. California and Arizona, for example, have a four-year statute of limitations; Montana has a five-year statute. The period for investigating if the return under-reports income or falsifies data may also be longer.Best to check with your state tax authorities to get specifics.
I guess you need to contact the Dept of Rev of OH for more info in detail; https://www-01.tax.state.oh.us/HB/Ta...l_emailus.html