ayush279
I made an error and entered July as my degree conferred date instead of august. Does discrepancy in that play any major role and should I write an email to adcomm to rectify it.
In general, I would define errors in applications as either clerical (incorrect salary info, employment dates, and even degree confer date) or content (spelling mistake in the essay, leaving in a reference to another school in a passage you're re-using, basically any 'original content' you have produced).
Clerical errors I don't think impact you at all in terms of decisions but will be problematic come the background check should you get in - I would email the adcom, apologize for overlooking it, and request a change. Most schools have an operations team that will take care of that, and in most cases the adcom won't even know. For some reason, in my Haas app, my salary info was missing in the final proof so I just dropped the adcom a mail and the ops team changed it - this was before the deadline so the adcom wouldn't have started reviewing apps.
The converse relationship might be the case for content errors: might impact your chances in terms of decisions, but would not be something I would recommend reaching out to the adcom to change. What you're essentially asking them to do in this case is grant you extra time. All other applicants submitted on time, as did you, but you hypothetically didn't proofread enough, and only did so after the deadline - you're therefore asking for special treatment which they likely don't enjoy hearing. In reality though, small content errors might be overlooked anyway because adcoms take 15-20 minutes to read a whole app and might just gloss over it.