On the filing of the application, the commissioner shall determine the amount of the refund to which the applicant is entitled. If the amount is not less than that claimed, the commissioner shall certify the amount to the director of budget and management and treasurer of state for payment from the tax refund fund created by section 5703.052 of the Revised Code. If the amount is less than that claimed, the commissioner shall proceed in accordance with section 5703.70 of the Revised Code.
Application for a refund shall be made as an application for refund of amounts erroneously paid and shall be subject to the requirements and procedures of division (A) of this section. On the filing of the application, the commissioner shall determine the amount of refund due and certify that amount to the director of budget and management and treasurer of state for payment from the tax refund fund. When a refund is granted for payment of an illegal or erroneous assessment issued by the commissioner, the refund shall include interest on the amount of the refund from the date of the overpayment. The interest shall be computed at the rate per annum prescribed by section 5703.47 of the Revised Code.
R.C. § 4307.05