To verify that TurboTax calculated the correct amount of tax; look up the amount on line 5 of form IT 1040, in the tax table beginning on page 33 at <a rel="nofollow" target="_blank" href="
http://www.tax.ohio.gov/portals/0/forms/ohio_individual/individual/2018/PIT_IT1040_Booklet.pdf">http...>
It's possible that your employer simply made a mistake on withholding.
