I have a question: I work in France on assignments (short contracts) and I benefit from Social Security. I would like to open a business in the United States, and keep my work in France too. Can I do that? Where do I pay taxes? Can I reside 6 months in a country & 6 months in another? And how does this work with taxes and social security? (I have French and American nationalities). If no one can answer my questions, can you direct me to someone who knows?