Custom and Border Protection relies upon CBP Form 7501 "Entry Summary" to determine relevant information (e.g., appraisement, classification, origin, etc.) regarding the imported commodity.
CBP Form 7501 - Entry Summary with Continuation Sheets. Includes detailed instructions on completing CBP Form 7501.
Form 7501A - Document/Payment Transmittal. This form is used to reconcile a supplemental payment after an initial Automated Clearinghouse payment.
3550-055 Instructions for Deriving Manufacturer/Shipper Identification Code: Instructions on calculating the manufacturer identification number. See also 19 CFR at Part 102 and CBP Form 7501 Instructions.