Additional modification reducing federal adjusted gross income

In addition to amounts authorized to be subtracted from federal adjusted gross income pursuant to subsection (c), section twelve of this article, any payment made under a prepaid tuition contract or other college savings plan administered by the board, pursuant to article thirty, chapter eighteen of this code, is also an authorized modification reducing federal adjusted gross income, but only to the extent the amount is not allowable as a deduction when arriving at the taxpayer's federal adjusted gross income for the taxable year in which the payment is made. This modification is available regardless of the type of return form filed. The taxpayer may also elect to carry forward the modification over a period not to exceed five taxable years, beginning in the taxable year in which the payment was made.