If the amount of estimated tax paid under this Article exceeds the taxes against which the estimated tax is credited pursuant to this Article, the excess is considered an overpayment by the taxpayer and shall be refunded as provided in Article 9 of this Chapter. (1959, c. 1259, s. 1A; 1967, c. 1110, s. 5; 1973, c. 476, s. 193; 1983, c. 713, s. 86; 1993, c. 315, s. 1.)