1. For each taxable year beginning on or after January 1, 2003, each individual or corporation entitled to a tax refund may designate that all or part of the refund due be credited to the state general revenue fund. The contribution designation authorized by this section shall be clearly and unambiguously printed on the first page of each income tax return form provided by this state. If any individual or corporation which is not entitled to a tax refund wishes to make a contribution to the state general revenue fund, such individual or corporation may, by separate check, draft, or other negotiable instrument, send in with the payment of taxes, or may send in separately, that amount, clearly designated for the state general revenue fund, the individual or corporation wishes to contribute and the department of revenue shall forward such amount to the state treasurer for deposit to the state general revenue fund as provided in subsection 2 of this section.

2. The director of revenue shall transfer at least monthly all contributions designated by individuals or corporations pursuant to this section to the state treasurer for deposit to the state general revenue fund.