If an american citizen lives in Argentina for over 330 days of that?
It does not matter if you live in Argentina or Tanganica. You will need to pay taxes in the USA. 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. Your worldwide income is subject to U.S. income tax, regardless of where you reside. U.S. Citizens and Resident Aliens Abroad