Okla. Stat. tit. 68 § 255.2
As provided in Section 426 of Title 63 of the Oklahoma Statutes, the Oklahoma Medical Marijuana Authority and the Oklahoma Tax Commission shall enter into a contract whereby the Tax Commission shall have authority to assess, collect and enforce the seven percent (7%) tax on retail medical marijuana sales and any penalties and interest thereon. Such assessment, collection and enforcement authority shall apply to any tax and any penalty or interest liability on retail medical marijuana sales existing at the time of contracting. The contract shall provide for the assessment, collection and enforcement of the tax on retail medical marijuana sales in the same manner as the administration, collection and enforcement of any tax payable by any taxpayer subject to taxation under any state tax law. For providing such collection assistance, the Tax Commission shall charge the Oklahoma Medical Marijuana Authority a fee of one and five-tenths percent (1.5%) of the gross collection proceeds. All funds retained by the Tax Commission for the collection services shall be deposited in the Tax Commission Reimbursement Fund in the State Treasury.
Okla. Stat. tit. 68, § 255.2