 The question is, after someone submits their application for admission to a U.S. college or university, can they edit it after it's been submitted? For the most part, no. So after you submit something like the Common App or the application, that's going to be your application to the university. So that's why it's really important to start early, proofread, and look over things before you send them, because it's really important to make sure you're putting your best product out there when you send it in. Is it possible to submit supplemental materials after the deadline? Yeah, absolutely. So if you do make a mistake and you want to send in a supplemental letter or an email or explaining it, I would recommend doing that as well, or an extra letter or something like that is always helpful. Yes.