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Working as a freelancer overseas, but US Citizen, what is my tax situation?
This person must pay taxes in both the overseas country and in the U.S. This is unusual; generally, only the U.S. demands this. Depending on the specific country, he would likely not be taxed twice as the U.S. generally recognises tax paid in a different country. Note there are some gotchas, though. For example, although Canada has a generally higher tax scheme than the U.S., you may still end up owing tax if you use the Tax-Free Savings Account system in Canada, as that is not recognised in the U.S. As to whether or not this person should form a company, that is far too broad a question. It's going to depend in large part on the tax situations of the countries involved. This person needs to consult an accountant specialising in this situation. That is, on personal versus business tax and on tax involving U.S. citizens. Yes, this person can and indeed must file and pay taxes in the U.S., from outside the U.S.