U.S. Citizens and Resident Aliens Abroad – Filing Requirements
If you are a U.S. citizen or resident alien 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. Your income, filing status, and age generally determine whether you must file a return. Generally, you must file a return if your gross income from worldwide sources is at least the amount shown for your filing status in the Filing Requirements table in Chapter 1 of Publication 54, Tax Guide for U.S. Citizens and Resident Aliens Abroad.