Generally, when a Foreign Transaction occurs at your site, you are reimbursed through CFN by the Card-Issuing Participant:
CFN BASE PRICE (OPIS + Haul + Fee) + Federal Excise Tax + Federal Environmental Tax + State Excise Tax + State Environmental Tax + Local Tax + Sales Taxes (if any).
As the Site Owner, you will be responsible for handling and filing these taxes. This should not involve filing any additional tax returns than what you already file. (Generally, it may involve remitting sales tax to the proper authorities and/or you are simply reimbursed the taxes you have already paid to your supplier.)
Card-Issuing Participant Tax Responsibility
Generally, when your customer procures products at a Remote network site, you do not have to file or claim any taxes. The appropriate taxes are collected from you through CFN and are re-distributed to the Host Participant. The Host Participant will be responsible for handling and/or filing these taxes. (Generally, as the Remote Participant, you will pass these taxes to your customer.) If Sales Tax is applicable and you are an In-State participant, you will have to charge the Sales Tax directly to your customer and report/remit this tax to the state.