Section 57-34-04.3 - Claims for credit or refund - Continuing appropriation1. A telecommunications carrier may file a claim for credit or refund of an overpayment of any tax imposed by this chapter within three years after the due date of the return or within three years after the return was filed, whichever period expires later.2. A claim for credit or refund must be made by filing with the tax commissioner an amended return, or other report as prescribed by the tax commissioner, accompanied by a statement outlining the specific grounds upon which the claim for credit or refund is based.3. Refunds under this section must be paid by the tax commissioner and are appropriated from the state general fund as a standing and continuing appropriation to the tax commissioner for that purpose.4. The tax commissioner shall notify the telecommunications carrier if the state board of equalization disallows all or part of a claim for credit or refund. The decision of the state board of equalization denying a claim for credit or refund is final and irrevocable unless the telecommunications carrier brings an action against the state in district court within six months of the mailing of the notice denying the claim for credit or refund.