While the Ohio Department of Taxation updates the Ohio sales tax chart every quarter, in some quarters it makes no changes to the tax rates. Individual counties can also increase sales taxes, and the Ohio Department of Taxation tracks these changes, according to the department's official website.
Ohio counties and transit authorities may only change tax rates at the beginning of each quarter, as the Ohio Department of Taxation explains. Comprehensive information regarding sales tax rate changes is available for each quarter at the Ohio Department of Taxation website, which lists rates by city, county, transit authority or ZIP code. An email alert service from the department can provide any interested person with updates on sales tax rate changes.