customs business
(2) The term “customs business” means those activities involving transactions with U.S. Customs and Border Protection concerning the entry and admissibility of merchandise, its classification and valuation, the payment of duties, taxes, or other charges assessed or collected by U.S. Customs and Border Protection upon merchandise by reason of its importation, or the refund, rebate, or drawback thereof. It also includes the preparation of documents or forms in any format and the electronic transmission of documents, invoices, bills, or parts thereof, intended to be filed with U.S. Customs and Border Protection in furtherance of such activities, whether or not signed or filed by the preparer, or activities relating to such preparation, but does not include the mere electronic transmission of data received for transmission to Customs.