@Bobby ********
no issue if you’re only a few weeks over. After 1 week you can’t do it online & have to show up in person (with 2K baht cash) and manually fill in the forms.
Can’t speak to several months missing your 90 day report, but a few weeks should be a ‘routine paperwork’ situation. (I missed by a month last year and there was no issue … the officer even filled in my form while I scooted across the street to the ATM for 2K baht)