https://www.irs.gov/individuals/international-taxpayers/us-citizens-and-resident-aliens-abroad
If you are a U.S. citizen or resident living or traveling outside the United States, you generally are required to file income tax returns, estate tax returns, and gift tax returns and pay estimated tax in the same way as those residing in the United States.
If you are a U.S. citizen or resident alien, the rules for filing income, estate, and gift tax returns and paying estimated tax are generally the same whether you are in the United States or abroad. You are subject to tax on worldwide income from all sources and must report all taxable income and pay taxes according to the Internal Revenue Code.
The question is asked probably because there’s no real way of avoiding the empire’s grip if you’re born into it, even if you naturalize as a citizen of another country.
Yeah, I only learned about it recently too… It’s pretty ironic considering that the whole “No taxation without representation” colonial shtick continues to be worshiped by the bootlickers of the empire.