I'm moving to China from the US how do I enroll my 15 year old daughter in school?

It depends on what kind of school you choose for your daughter. If she knows nothing about Chinese language, you might send her to the international schools. Otherwise, it's not a good option for her to study at local schools with Chinese students.

The procedure for international school is not complicated. When you find the international school in the city where you stay, then you can contact them. The school will tell you what you need to provide.