S.D. Codified Laws § 47-1A-1326
A shareholder paid pursuant to § 47-1A-1324 who is dissatisfied with the amount of the payment must notify the corporation in writing of that shareholder's estimate of the fair value of the shares and demand payment of that estimate plus interest, less any payment under § 47-1A-1324. A shareholder offered payment under §§ 47-1A-1325 to 47-1A-1325.3, inclusive, who is dissatisfied with that offer must reject the offer and demand payment of the shareholder's stated estimate of the fair value of the shares plus interest.
A shareholder who fails to notify the corporation in writing of that shareholder's demand to be paid the shareholder's stated estimate of the fair value plus interest under this section within thirty days after receiving the corporation's payment or offer of payment under § 47-1A-1324 or §§ 47-1A-1325 to 47-1A-1325.3, inclusive, respectively, waives the right to demand payment under this section and is entitled only to the payment made or offered pursuant to those respective sections.
SDCL 47-1A-1326