You are correct. It is based on when the PD enters your data in MIRCS.. Date they print the receipt isn’t relevant.Doesn't that require that the date on the MIRCS receipt is early enough? The OP's original license expired 9/15. A 90 day extension would get him to 12/14. If the clerk ran the MIRCS transaction on Friday, it would be dated 12/18, unless there's a way to backdate it in MIRCS.
Or am I missing something?