I have been doing some research and Tariff charges CANNOT be prepaid. Tariff charges are calculated by US Customs AFTER arriving in US and goes through Customs. Where are you shipping from? this is still about 1 week in since Tariffs started so I cannot find information by individual real life experiences on Tariff charges. I am sure as time goes on we will see some examples hopefully so we know for sure what is happening. But since we have to wait until something arrives and goes through customs to find out the Tariff charge it will remain a mystery.