Also (note that I am not an accountant or lawyer and this is not advice), most ordinary people won't see any problem with taxation while abroad beyond the actual inconvenience of filing a 1040 because the foreign earned income exclusion (https://www.irs.gov/individuals/international-taxpayers/fore...) allows you to exclude foreign earned income up to $100,000 from US taxation. Since ordinary people pretty much all earn less than this, they only have to pay taxes to whatever country they are actually in. Only people who are rich enough to hire accountants have to worry about double taxation, and they can probably avoid it by other means that are well-studied among rich peoples' accountants.