If you live and work outside the U.S., you may still need to file a U.S. tax return if you have ANY foreign earned income, interest income, investment income, foreign capital gains, foreign trust income, foreign brokerage securities account income, etc. Per the IRS Tax Tip Publication #2014-13, read about some of the filing pointers below. 1. Report Worldwide Income. By U.S. law, U.S. citizens and resident aliens must include all and report all worldwide income. As me