I know there’s a rule that requires a micro-entrepreneur to have multiple clients, but is it acceptable if it has one client, which is my U.S. company, if my U.S. company has multiple clients?
Where are the payments for your work coming from, if you get paid solely from your own company then no?
If you have just one client then URSAFF usually consider you are an employee, not self-employed.
This URSAFf guide is a couple of years old, but in English so might help explain the system that would allow a company to set up an employee in France