S.C. Code Ann. § 12-6-3560
(A)
(2) If the entire credit is not used in the year earned, the remaining credit may be carried forward and applied against income tax liabilities for the next ten years. An entity taxed as a corporation for South Carolina income tax purposes shall claim the credit allowed pursuant to this section on its corporation income tax return. An entity not taxed as a corporation shall claim the credit on the returns of the partners or members as follows:
(B)