S.D. Codified Laws § 10-11-12

In all such cases of addition, correction, or other amendment of the tax lists, the fact that the same was made as an addition, correction, or amendment shall be made and the date of making the same shall be entered in the "remarks" or other appropriate column of the tax list. The original entries in such cases shall be left standing, but interlined and the new or corrected entries made with red ink.