For property tax purposes, the "assessment of the tax" occurs on the later of the last day the tax may be paid without penalty or the date of the tax notice.
The department, in its discretion, may adopt a determination made by the Internal Revenue Service with respect to an individual, and may follow rules issued by the Internal Revenue Service or Department of Treasury with regard to interpreting Internal Revenue Code Section 6511(h).
S.C. Code § 12-54-85
2005 Act No. 17, Section 2, provides as follows:
"This act takes effect upon approval by the Governor and applies for property tax years beginning after 2001. The time limitations provided in Section 12-54-85(F) of the 1976 Code do not apply for purposes of computing refunds pursuant to Section 12-37-220(B)(7) of the 1976 Code as amended in this act."
2007 Act No. 116, Section 34.B, provides as follows:
"This section takes effect upon approval by the Governor and applies to all assessments issued after that date."