I forgot to put on my common app that I interviewed with my top college. Will the interview mean nothing now as it is undocumented?
I don’t get your question. If you interviewed with your top college, the College will know about it and it will be part of your app. You don’t self-report that you had an interview or put it on the common app. The interviewer gives this info to the admissions office. If you interviewed either with alumni or at the college, they will know about it.