(1) In computing the amount of tax remitted to this state, a certified service provider under Model 1 described in section 21 may take a deduction from the revenue collected under Model 1 in this state as determined by the contract between the board and that certified service provider. The deduction under this section may be based on 1 or more of the following:

    (a) A base rate applicable to taxable transactions processed by the certified service provider for this state.

    (b) For a voluntary seller, a percentage of tax revenue generated for this state by that voluntary seller for a period not to exceed 24 months after the voluntary seller registered under the agreement.

    (2) In computing the amount of tax remitted to this state, a seller who has selected Model 2 as described in section 21 may take a deduction in addition to the deductions taken under section 4 of the general sales tax act or section 4f of the use tax act for a period not to exceed 24 months after the seller registered under the agreement equal to 1 or more of the following:

    (a) For all sellers, a base rate established by the board after the base rate is established for certified service providers under subsection (1).

    (b) For a voluntary seller, a percentage of tax revenue generated for this state by that voluntary seller.

    (3) In computing the amount of tax remitted to this state, a seller who has selected Model 3 as described in section 21 or a seller who has not selected any model described in section 21 may take the deductions under section 4 of the general sales tax act or section 4f of the use tax act. In addition, a voluntary seller who selected Model 3 or a voluntary seller who has not selected any model described in section 21 may take a deduction for a period not to exceed 24 months after the seller registered under the agreement equal to a percentage, determined by the board, of tax revenue generated for this state by that voluntary seller.