I believe it’s paid as part of clearing customs. Since everything is in some capacity inspected (even if that just means checking the weight, container seals, and serial numbers in the freight container), that means there’s some record of what’s coming in and from where. At that point the importer pays customs the various fees and taxes before customs let’s them take the goods out of the port of entry.
The importer would mark it down as part of the taxes that they paid on their purchase, but it would largely only matter so that they can appropriately indicate what portion of the purchase price was taxes that have already been paid so they don’t double pay later.
I believe it’s paid as part of clearing customs. Since everything is in some capacity inspected (even if that just means checking the weight, container seals, and serial numbers in the freight container), that means there’s some record of what’s coming in and from where. At that point the importer pays customs the various fees and taxes before customs let’s them take the goods out of the port of entry.
The importer would mark it down as part of the taxes that they paid on their purchase, but it would largely only matter so that they can appropriately indicate what portion of the purchase price was taxes that have already been paid so they don’t double pay later.