Section 7346 - Refund or credit of overpayment(a) In the case of any payment of tax not due under this article, the department may credit the amount of such overpayment against any liability in respect of the tax imposed by this article on the part of the person who made the overpayment and shall refund any balance to such person.(b) The department is authorized to prescribe regulations providing for the crediting against the estimated tax for any taxable year of the amount determined to be an overpayment of the tax for a preceding taxable year.(c) If the taxpayer has paid as an installment of estimated tax more than the correct amount of such installment, the overpayment shall be credited against the unpaid installments, if any. If the amount paid, whether or not on the basis of installments, exceeds the amount determined to be the correct amount of the tax, the overpayment shall be credited or refunded as provided in subsection (a) or (b).1971, March 4, P.L. 6, No. 2, art. III, § 346, added 1971, Aug. 31, P.L. 362, No. 93, § 4. Amended 1985, July 1, P.L. 78, No. 29, § 5, imd. effective.