Information about vehicle taxes is available at the South Carolina DMV website in the Titles and Registration article. The article notes that vehicle property taxes are required prior to receiving or renewing a license plate and outlines how to pay them.
Vehicle property taxes vary by county in South Carolina and each county's auditor determines them. All vehicle taxes must be paid to the county treasurer by each car owner. First-time registrants must go to the county auditor's office to receive a tax bill. Individuals who renew their registrations receive a renewal reminder and tax bill in the mail each year, as of 2015.