RE: Now I have four passports.
1. US
2. Switzerland
3. British National(Overseas)
4. Taiwan
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Have you ever thought about the TAX IMPLICATIONS of having so many passports?
For instance:
1) Do any of the above countries require you to file incomes taxes on earnings in the USA?
2) If you eventually decide to live in say, Switzerland... will the money you make in Switzerland ( or even the interests you make on your bank account there ) not be taxable by the USA?
Of all these countries, only the United States taxes citizens who's income is derived overseas and domiciled overseas.