S.D. Codified Laws § 10-47B-134
Any wholesale distributor or retail dealer licensed as a marketer in this state may apply for and obtain a refund for taxes paid to this state on any gallons of motor fuel, undyed special fuel, or liquid petroleum gas sold to customers whose accounts are found to be worthless. Accounts may not be deemed to be worthless unless they have been claimed as uncollectible and deducted as an expense on the licensee's federal income tax return. Upon application of this refund, the department shall have cause and authority to make an assessment and take collection action against the purchaser of the fuel in accordance with the provisions of chapter 10-59. A refund claimant shall only be eligible for a refund for the taxes not paid by a customer once every three years. The department shall notify all licensed suppliers, out-of-state suppliers, and marketers that the party has been delinquent in the payment of tax and that no further refunds will be paid for sales made to the party during the next three-year period. To qualify for a refund a marketer shall supply the department sufficient evidence and testimony to enforce any tax collection action by the department.
SDCL 10-47B-134