(1) Tax returns with respect to the regulatory assessment and surcharge prescribed by s. 624.515 shall be made by each insurer liable for payment of such tax on forms to be prescribed by the Department of Revenue and sworn to by one or more of the executive officers or other persons charged under the law with the management of the insurer. (2) In the event an insurer makes an overpayment on account of the assessment, a refund of the overpayment may be made to the remitter.
(3) The surcharge shall be state funds when collected and subject to refund only as provided in s. 213.756. 