North Dakota Century Code Title 57. Taxation § 57-60-10.1. Refund of overpayments

If it appears that as a result of a mistake an overpayment of a tax, penalty, or interest was made which was not due under the provisions of this chapter, then such amount must be credited against any amount due under this chapter from the person who made the erroneous payment or must be refunded to such person; provided, that the person entitled to the overpayment makes a written claim for it to the commissioner within six years after the date the overpayment was received by the commissioner. If a refund is authorized by the commissioner, the commissioner shall certify the amount of the refund, the reason for it, and the name of the person entitled to it to the office of management and budget which shall thereupon draw a warrant for such amount on the funds to which the overpayment was credited.