SDCL § 10-45-30.1: Cash basis reporting and payment.

Notwithstanding other provisions of this chapter, the secretary of revenue shall allow retailers to report and pay sales tax measured by gross receipts upon a cash basis if:

(1) The retailer has not changed his basis in the previous calendar year;

(2) The retailer's records are kept in a manner which may be audited to determine whether sales tax is paid upon all taxable sales;

(3) The retailer has made a written request to the secretary for authority to pay tax on the cash basis; and

(4) Authority to pay tax on the cash basis applies only to sales made after the authority is granted.