S.C. Code Ann. § 59-2-80

(A) All property and income of the SCCIP trust fund, as an instrumentality of the State, shall be exempt from all taxation by the State and by its political subdivisions. (B) Any interest, dividends, gains, or income accruing on the payments made pursuant to an investment trust agreement under the terms of this chapter or on any account in the SCCIP Trust Fund shall be excluded from the gross income of any such account owner, contributor, or beneficiary for purposes of South Carolina income taxes, to the extent such amounts remain on deposit in the SCCIP Trust Fund or are withdrawn pursuant to a Qualified Withdrawal. The SCCIP Trust Fund and Tuition Prepayment Program under Chapter 4 of this title shall constitute the only programs established pursuant to Section 529 of the Internal Revenue Code of 1986, as amended. (C) The earnings portion of any withdrawals from an account that are not qualified withdrawals shall be included in the gross income of the resident recipient of the withdrawal for purposes of South Carolina income taxes in the year of the withdrawal. Withdrawals of the principal amount of contributions that are not qualified withdrawals must be recaptured into South Carolina income subject to tax to the extent the contributions were previously deducted from South Carolina taxable income. (D) Contributions to each investment trust account created under this chapter by a resident of this State or a nonresident required to file a State of South Carolina income tax return are deductible from South Carolina income subject to tax up to the limit of maximum contributions allowed to such accounts under Section 529 of the Internal Revenue Code of 1986, as amended, including funds transferred to an investment trust account from another qualified plan, as allowable under Section 529 of the Internal Revenue Code of 1986, as amended, and to the extent that the transferred funds were not permitted a state income tax deduction previously under South Carolina law. For purposes of this subsection, the term "qualified plan" means any plan qualified under Section 529 of the Internal Revenue Code of 1986, as amended. State income tax deductions as provided for in this section may be taken in any taxable year for contributions and rollovers made during that taxable year, and up to April fifteenth of the succeeding year, or the due date of a taxpayer's state income tax return excluding extensions, whichever is longer.