How soon can you start exporting after FDA registration?
If successful, the FDA registration will be completed in about one week.
Export can begin after you have completed FDA registration and obtained your Owner/Operator Number and Listing Number. You don't have to wait until you can check it on the FDA website, or even get your Registration Number.
When your products arrive at the US customs, you only need to present the Owner/Operator Number and Listing Number for customs clearance.