<p>Have no idea about scores. Maybe email the undergrad office and ask them when they typically receive them? They’ll probably tell you “sometime in July”, so hopefully someone on here can tell you. Try asking on another thread too.
And yes, you can always adjust your schedule up until the add/drop deadlines. Remember, people do this all the time. When ED still existed lots of those students picked earlier orientations (another “shoot me down!” statement about to come) and most of those ED students typically excelled on AP tests and earned credits. Thus, people have been changing schedules after orientation for a long time (including me last year).</p>