Ohio Rev. Code Ann. § 718.08
(A) As used in this section:
(B)
(1) Except as provided in division (F) of this section, every taxpayer shall make a declaration of estimated taxes for the current taxable year, on the form prescribed by the tax administrator, if the amount payable as estimated taxes is at least two hundred dollars. For the purposes of this section:
(C)
(1) The required portion of the tax liability for the taxable year that shall be paid through estimated taxes made payable to the municipal corporation or tax administrator, including the application of tax refunds to estimated taxes and withholding on or before the applicable payment date, shall be as follows:
(D)
(1) In the case of any underpayment of any portion of a tax liability, penalty and interest may be imposed pursuant to section 718.27 of the Revised Code upon the amount of underpayment for the period of underpayment, unless the underpayment is due to reasonable cause as described in division (E) of this section. The amount of the underpayment shall be determined as follows:
(E) An underpayment of any portion of tax liability determined under division (D) of this section shall be due to reasonable cause and the penalty imposed by this section shall not be added to the taxes for the taxable year if any of the following apply:
(F)