S.C. Code § 12-36-2695
Any business that is required to collect or pay sales and use taxes or admissions taxes whose business location changes from North Carolina to South Carolina as a result of the boundary clarification, as contained in the amendments to Section 1-1-10, effective January 1, 2017, is required to obtain a South Carolina retail license or admissions tax license for that location before January 1, 2017, and begin collecting and paying South Carolina sales and use taxes or admissions taxes on January 1, 2017. The retailer must apply for a retail or admissions tax license prior to January 1, 2017, and indicate on the license application the date the taxpayer anticipates beginning to collect sales, use, or admissions taxes is January 1, 2017.
S.C. Code § 12-36-2695