Refund for overpayment

(1) Whenever the department determines that the tax due under this article has been overpaid, the department is authorized to refund the amount of the overpayment, together with interest at the rate prescribed by section 39-21-110.5 from the date of the overpayment or from nine months after the date of the decedent's death or the generation-skipping transfer, whichever is later, pursuant to a claim for refund for the same filed by the person required to file the return or the person who paid the tax. No claim for refund may be filed after the later of either: