Okla. Stat. tit. 68, § 2368.11

A. The Oklahoma Tax Commission shall include on each state individual income tax return form for tax years beginning after December 31, 2004, and each state corporate tax return form for tax years beginning after December 31, 2004, an opportunity for the taxpayer to donate from a tax refund for retiring the debt incurred in construction and completion of the dome on the Oklahoma State Capitol. B. The monies generated from donations made pursuant to subsection A of this section shall be collected by the Tax Commission and placed to the credit of the Oklahoma Capitol Complex and Centennial Commemoration Commission Revolving Fund to help defray the expense to construct and complete the dome on the Oklahoma State Capitol.