S.D. Codified Laws § 10-45-61.1 (2026)
Notwithstanding the provisions of §§ 10-45-61, 10-59-3, and 10-59-7, if the seller has not obtained an exemption certificate or all relevant data elements for an exemption certificate, the seller may, within one hundred twenty days subsequent to a request for substantiation by the Department of Revenue, do either of the following:
(1) Obtain a fully completed exemption certificate from the purchaser, taken in good faith which means that the seller obtained a certificate that claims an exemption that:
Any exemption certificate presented after one hundred twenty days need not be considered by the department.
Source: SL 2007, ch 59 , § 1; SL 2020, ch 35 , § 1.