my shipment is stick in us customs

Hello, I send my products from Turkey to Amazon FBA for the first time , the US customs ask to fill out FSVP file ,"The Foreign Supplier Verification Programs (FSVP) rule requires FSVP importers to verify that the food they import"

should I be a registered US company to import food supplement!

they ask to these info in the file

US Agent Company Name

US Agent Address

US Agent DUNS Number

US Agent Phone Number

US Agent Email Address

US Agent Contact Name

US Agent Signature:

I don't have US regesterd company, What should I do

I have all certeficates for the products