S.C. Code Ann. § 12-54-100 — Authority of department to conduct examination or investigation

(A) In the administration of a state tax law, the director or his duly authorized agent, for the purpose of ascertaining the correctness of a return or making a determination of or fixing tax liability, may examine or investigate the place of business, tangible personal property, facilities, computers, computer programs, electronic data, books, invoices, papers, records, memoranda, vouchers, other documents, equipment, or licenses of the taxpayer or other person bearing upon the matters required to be included on a return.
(B) The taxpayer or other person and his agents and employees shall exhibit to the director these places and items and facilitate the examination or investigation.
(C) A taxpayer, upon request, may delay the examination up to thirty days, except that the provisions of this subsection do not apply if there is reasonable evidence that the taxpayer is about to destroy or remove the items from the State or otherwise make them unavailable for examination or investigation.
(D) The director may employ proper and reasonable audit methods necessary to the examination or investigation, including the use of sampling.