S.C. Code § 12-37-150
If as a result of the boundary clarification, as contained in the amendments in Section 1-1-10, effective January 1, 2017, an individual is required to register his personal motor vehicle in South Carolina and, if the property taxes on that motor vehicle would have been less in North Carolina, the individual may receive a tax rebate from the applicable South Carolina county for the difference between the tax the individual was required to pay in South Carolina and the individual was required to pay in North Carolina on that same vehicle based on the latest North Carolina assessment for the motor vehicle. In order to receive this rebate the individual must provide the county with a copy of the last North Carolina county property tax assessment for the same motor vehicle. The individual is entitled to this rebate for two years, including any partial year.
S.C. Code § 12-37-150