It’s like lets say this individual lives in a state with no sales tax like Delaware (US) purchasing stuff from a seller living in Fukuoka (Japan), the value of this item is ¥30,000 ($189.50) while the same being sold in America is jacked up in price at around $349.99 MSRP retail. However, they’re hit with a notification their package is being held due to tariffs waiting to be paid before it can be delivered (even in a state with 0% sales tax).
Tariffs aren’t sales taxes.
They’re completely independent of each other.
One is charged by the federal government, the other by the state and/or local government.