S.D. Codified Laws § 10-46-32

The tax imposed by this chapter upon those sales of motor vehicle fuel which are subject to tax under this chapter, shall be collected by the state auditor by way of deduction of refunds otherwise allowable under the provisions of the South Dakota statutes applicable thereto. The state auditor shall, when issuing a warrant in payment of any refund claimed under chapter 10-47B after the application for said refund has been approved by the secretary of revenue, first cause to be determined the amount of tax due imposed by this chapter on the purchase price of the motor fuel on which the refund is claimed and shall issue the warrant for refund in the amount claimed after deducting the amount of tax due on the purchase price of said motor fuel that is imposed by this chapter and shall issue a warrant to the Department of Revenue once each month for the total amount of the deduction made from such refunds and the secretary of revenue shall employ the necessary clerical help, auditors or bookkeepers to aid the said state auditor to determine the correct amount due under this chapter upon those sales of motor vehicle fuel upon which an application for refund of the motor fuel tax is made.