(3) If the difference is an excess, the commissioner shall issue a refund of that amount to the taxpayer. If the amount of the refund is less than that claimed by the taxpayer, the taxpayer, within sixty days of the issuance of the refund, may provide to the commissioner additional information to support the claim or may request a hearing. Upon receiving such information or request within that time, the commissioner shall follow the same procedures set forth in divisions (C) and (D) of section 5703.70 of the Revised Code for the determination of refund applications. If the taxpayer has a deficiency for one tax year and an excess for another tax year, or any combination thereof for more than two years, the commissioner may determine the net result and, depending on such result, proceed to issue an assessment or certify a refund.