If, upon written application by a taxpayer to the county treasurer for a refund, it appears a tax has been paid in excess of the amount actually due or upon a sale or other transfer declared to be exempt, such excess amount or improper payment shall be refunded by the county treasurer to the taxpayer; provided that no refund shall be made unless the state has first authorized the refund of an excessive amount or an improper amount paid, unless such improper amount was paid as a result of a miscalculation. Any refund made shall be withheld from the next monthly distribution to the city. (Ord. 470 § 9, 1982).