See the information below regarding AP Exam Registration.
ATTENTION! Students and guardians should complete this registration/enrollment together. This is a two-step process and both steps MUST be completed to access the AP Classroom resources and/or order AP Exams. The entire process (both steps) can be completed in a single sitting in approximately 10 mintues.
The link is below.
https://user.totalregistration.net/AP/210000
Original source can be found here.