The credit shall be claimed for the calendar year specified in the certificate and in the order required under section 5726.98 of the Revised Code. If the credit exceeds the amount of tax otherwise due in that year, the excess shall be refunded to the taxpayer, provided that, if any amount of the credit is refunded, the sum of the amount refunded and the amount applied to reduce the tax otherwise due in that year shall not exceed three million dollars. The taxpayer may carry forward any balance of the credit in excess of the amount claimed in that year for not more than five ensuing years, and shall deduct any amount claimed in any such year from the amount claimed in an ensuing year. A taxpayer may claim against the tax imposed by this chapter any unused portion of the credit authorized under section 5725.151 of the Revised Code, but only to the extent of the five-year carry forward period authorized by that section.
R.C. § 5726.52