S.C. Code Ann. § 12-36-2580: Special authorization to pay tax quarterly.

When the total tax for which any person is liable under this chapter does not exceed one hundred dollars for any month, a quarterly return and remittance, instead of a monthly return, may be made on or before the twentieth day of the month following the end of the quarter for which the tax is due, when specifically authorized by the department and under rules and regulations prescribed or promulgated by the department.