(a) A member insurer may offset against its premium tax liability to this state an assessment described in Code Section 33-38-15 to the extent of 20 percent of the amount of such assessment for each of the five calendar years following the year in which such assessment was paid. In the event a member insurer should cease doing business, all uncredited assessments may be credited against its premium tax liability for the year it ceases doing business.

(b) Any sums which are acquired by refund, pursuant to subsection (f) of Code Section 33-38-15, from the association by member insurers and which have theretofore been offset against premium taxes as provided in subsection (a) of this Code section shall be paid by such insurers to this state in such manner as the Commissioner may require. The association shall notify the Commissioner that such refunds have been made.