S.D. Codified Laws § 29A-3-708
If any property not included in the original inventory comes to the knowledge of a personal representative or if the personal representative learns that the value or description indicated in the original inventory for any item is erroneous or misleading, the personal representative shall make a supplementary inventory or appraisement showing the market value as of the date of the decedent's death of the new item or the revised market value or descriptions, and the appraisers or other data relied upon, if any. The personal representative shall file the supplemental inventory with the court if the original inventory was filed, and shall mail or deliver a copy of the supplemental inventory to the persons sent a copy of the original inventory and to other interested persons who request it.
SDCL 29A-3-708