This information is for AP coordinators:
The first time you submit your exam order is considered your initial order. If you need to make updates after submitting your initial exam order, you need to submit these changes through AP Registration and Ordering. Changes could include students transferring to or out of your school, alternate exams for late testing, or special exam materials for students with accommodations. If you have unsubmitted changes, you’ll see the message View Unsubmitted Changes on the Orders page in AP Registration and Ordering.
You can submit changes to your order as many times as necessary until the November 15 final ordering deadline without incurring any additional fees. Changes submitted after November 15 and by March 15 may incur fees. See What are the policies for late order and unused/canceled exam fees?