Taxes are percentages taken from your paycheck, depending on your income. If you overpay, you get a tax return, meaning you get your excess contribution back. Tariffs are the same thing, but applied before you spend, which means everyone pays into it, regardless of income, and none of the excess contribution is paid back. This is the bast way I can explain it. Feel free to expand on it, because US Americans have been severely cheated on this one.