Ohio Revised Code Title LVII. Taxation § 5753.06

(A) A taxpayer may apply to the tax commissioner for a refund of amounts imposed under this chapter that were overpaid, paid illegally or erroneously, or paid on an illegal or erroneous assessment. The application shall be on a form prescribed by the tax commissioner. The taxpayer shall provide the amount of the requested refund along with the claimed reasons for, and documentation to support, the issuance of a refund. The taxpayer shall file the application with the tax commissioner within four years after the date the payment was made, unless the applicant has waived the time limitation under division (D) of section 5753.07 of the Revised Code. In the latter event, the four-year limitation is extended for the same period of time as the waiver.

(B) Upon the filing of a refund application, the tax commissioner shall determine the amount of refund to which the applicant is entitled. If the amount is not less than that claimed, the tax commissioner shall certify the amount to the director of budget and management and treasurer of state for payment from the tax refund fund. If the amount is less than that claimed, the tax commissioner shall proceed under section 5703.70 of the Revised Code.

(C) Interest on a refund applied for under this section, computed at the rate provided for in section 5703.47 of the Revised Code, shall be allowed from the later of the date the amount was due or the date payment was made. Except as provided in section 5753.07 of the Revised Code, the tax commissioner may, with the consent of the taxpayer, provide for crediting against the tax due for a tax period, the amount of any refund due the taxpayer for a preceding tax period.

(D) Refunds under this section are subject to offset under section 5753.061 of the Revised Code.