I don't mean to be quarrelsome @tassojunior, but I checked and my statement is correct.
"If you are a U.S. citizen or resident alien, the rules for filing income, estate, and gifttax returns and paying estimated tax are generally the same whether you are in theUnited States or abroad. Your worldwide income is subject to U.S. income tax, regardless of where you reside."
Source: https://www.irs.gov/individuals/international-taxpayers/taxpayers-living-abroad