S.C. Code Ann. § 12-60-470
(B) The refund claim must specify:
(8) other relevant information that the department may reasonably require.
The department will make forms available which taxpayers may use to file a claim for refund.
(C)
(1) Only the taxpayer legally liable for the tax may file a claim for refund or receive a refund, except that:
(a) a person who acts as a collector and remitter of state taxes may claim a credit or refund of the tax collected, but only if the person establishes that he has paid the tax in question to the State; and