Interesting question! I'm also a "digital nomad". I'm French and, all my incomes are declared in France as an "auto-entrpreneur". But I don't have too since I live there less than 6 months a year. Last year, I stayed 3 months in France, 3 in China, 2 in Thailand, in Korea and in Indonesia. I was wondering if there was a country where I could open an entity with some advantages?