S.D. Codified Laws § 10-50C-10

A cigar shipper shall remit the tax prescribed pursuant to § 10-50-61 based upon the wholesale purchase price, as defined in this chapter, for any cigars sold and shipped to a consumer in this state. If there is no wholesale purchase price, the cigar shipper shall remit the tax prescribed pursuant to § 10-50-61 based upon the manufacturer's cost, as defined in this chapter, for any cigars sold and shipped to a consumer in this state. The cigar shipper shall remit the taxes quarterly on or before the fifteenth day of the month following each quarterly period.