So, I applied to CS in engineering during the priority filling period, but I did not add a second choice major. Is it possible for me to a second choice major now through the program change form, even though the deadline has passed, and still be considered in the priority period?
I would contact an admissions counselor and ask. (Theirs seem to be quite responsive, in my experience.) It would certainly be a good idea to add a second choice if they’ll allow it.
@Mtriplee I have sent an email, the form states that it can be done before the decision release, so here’s hoping! Thank you 
That’s great, @hellolol. Best of luck to you!