After you file

Failure to file  "we assess penalty for each month or part of month the return is late". On the IRS website, it notes it received payment the same day as the submission (8/2). However, they still went on to assess the full 30 days for the period at hand (7/15-8/15). I'm just attempting to cut this penalty in half but there isn't a clear method to challenge the fee within the IRS portal.