S.C. Code Ann. § 12-16-1180: Production of documents and other information.

At any time after the expiration of the time required by this chapter for the filing of any return required therein the department may require the personal representative or any person or corporation interested in the succession to appear at the office of the department at a time the department designates and produce for the use of the department in determining whether or not the estate is subject to tax and the amount of tax, if any, all books, papers, or securities which may be within the possession or within the control of the personal representative or beneficiary relating to estate or tax and to furnish other information relating to the same as he may be able and the department may require.