I am a QB finalist who did not get matched, which makes me a QB scholar. Is this an achievement you put down on the common app(I feel like it is)? And if so, do I list it in the education section of the app?
You are a QuestBridge Finalist and you should definitely include it on the Common App as a national award.
A QuestBridge scholar is a finalist who is matched or accepted to a partner college through QB, per the QB glossary:
Definitely list Questbridge Finalist, put it under awards.