I submitted my yale application.
Moments later I realized something horrible: my engineering supplement was missing the last paragraph and contained 2 typos.
I emailed the admission office and they asked me to upload my full essay on the portal-
Which I did along with an explanation.
Do you think that will hurt my chances by making me seem “unprofessional”?
Seems to me that you acted very professionally and fixed the problem immediately.
You absolutely did NOT ruin your chances.
Don’t worry, they’ll see that you immediately attended to the problem. Your chances won’t be altered.