There are a couple colleges that I applied to that I recently found out require all test scores, and I instead only sent my best scores. Will they know? And can I still get accepted in this situation?
You should follow up and tell them the ones that are missing via email, and get the official ones sent.
Some high schools include all the scores on the transcripts, so colleges can tell if students haven’t submitted all of them. They can reject students if they think they’re not being completely truthful. Even after acceptance colleges can expel students and rescind diplomas if they discover they lied on their apps.
You email right away, saying you didn’t realize all scores were required, and that the scores are on their way. Then hope you still have a chance, because it seems that you knew you should have sent them all. If you are accepted, then discovered, how humiliating will it be to be rescinded, or worse, kicked out? Be honest and try to rectify the situation. Hopefully you will still be considered.
Send the rest now. Send an email apologizing for the oversight. Why are you waiting?