The receipts from the tax established under sections 66-4,145, 66-4,146, and 66-6,109 shall be credited to the Highway Trust Fund. Credits and refunds of such tax allowed to producers, suppliers, distributors, wholesalers, exporters, importers, or retailers shall be paid from the Highway Trust Fund. The balance of the amount credited, after credits and refunds, shall be allocated to the Highway Allocation Fund.