It says that we can send FASFA up to 10 schools, but what happens if you applied to more than 10 and wanted to send it to say 15 schools?
Submit with the first ten, once it has been accepted delete the first ten and list the next five, then resubmit.
Wait until you’re notified it’s been processed. That should be 2 or 3 days after it’s been submitted.
FAFSA includes instructions for that
https://fafsa.ed.gov/help/fotwfaq14.htm