Here is the link for the application to the Free and Reduced-Priced Meals program.
It is my understanding that even if you do not qualify for free or
reduced-priced meals, just by applying you will be able to have your AP
exam fees waived (so you would pay $5 instead of $95). I am not sure how
long you are able to fill out the application, so do it as soon as
possible...just to be safe.