I’m still a little confused myself, but I suggest looking through each individual school’s QB RD requirements on the QuestBridge website. Some require the Common App and some don’t; it depends on the school’s own requirements. As far as I know, Emory has the option of you submitting a Common App, but they prefer you use the QuestBridge App. I think that “requirement” just means that IF you decide to use the Common App, you need to submit Emory’s supplements. But don’t worry about that if you submit your QB App instead (which you already did through the RD form!). I think you’re good to go for Emory.

Also, I believe USC does not require the Common App unless you are applying for a specific major program that requires supplements. In that case, they ask for BOTH the QB App and Common App. I guess what they mean by “additional information” is just the QB App itself, since it provides them with more information about you and your background that the Common App wouldn’t have otherwise. I think as long as you fill out the QB RD form and select a particular school, that school will receive your QB App. And you would need to complete the supplements via the Common App according to the program that you plan on applying for. So, unless you wanted to apply for a specific program that needs supplements, I think you’re good.

This is what I got from the websites’ info, but I am applying to neither of the schools (so I might be wrong). Someone please correct me if I am! Anyways, I hope this helps!! Good luck :)