The answer is not simple. You should use a tax preparer familiar with the tax needs of expatriate American taxpayers.Even if your US tax is zero, you are legally obliged to file US taxes until your death or until your income level falls below statutory minimum.Expats have INDEPENDENT sets of filing requirements concerning their foreign financial matters; failure to comply makes you liable to high penalties:Income tax declarationForeign financial accounts and instruments reportForeign corporate interestsIncome tax on income earned from foreign activities is treated by one of two alternative regimes:FEIC (Foreign Earned Income Exclusion) If you are a legal resident of a foreign nation where you are taxed, you can opt to exclude up to a threshold maximum of some $90k, PRORATED only for the time you were not in the United States. If you are not a legal resident of the foreign nation, you cannot use this regime unless you were physically present for more than 6 months per calendar year (but most foreign nations would oblige you to be legally resident for that period length, anyway). This exclusion is ONLY FOR EARNED INCOME, not other sources of income like interest, social benefits, dividends, capital gains, gifts, inheritance or trust disbursements.FTC (Foreign Tax Credit) If you are taxed by a foreign government with which there is a double taxation treaty with the USA, you may opt for the regime where you deduct certain taxes paid to foreign governments from your calculated US tax amount.I reiterate, you also have to file “FBAR” reports every year that you total non-US liquid assets exceeded USD10k at any point in the year.