Can I file my 90-day report in Phuket if I missed the online deadline?

You have 7days after the due date to submit 90days report at the immigration office without being fined. That means the 25th is the latest and right now Immigration offices in Bangkok are open on Saturdays. If two of you come back to Bangkok next week, maybe have a chance to go to MTT for a 90days report. Only one has to go for all of you. But the original passports are required to report at the immigration office, so not sure this is an option for you.

You might indeed be able to file a 90 day report in Phuket by showing that you stay there (via a TM30 receipt) BUT when you come back up here to bangkok they're going to give you grief about it when you file the next one. <- there's almost no way around that.

Had you been on top of it more you could have mailed it in (2 weeks ago) using your bangkok address as the return address.

I'd say don't even try to do it down there, if the online system won't work, just suck it up and when you come to bangkok go file and pay the 2000baht fine. It's certainly not the end of the world

@Tullio ******

you can use the online system from 2 weeks before the due date right down to the actual due date (they changed that back on march 20, 2020)

Yes, you can.

At least from my experience , the Phuket immigration did my 90 days without asking for anything the last time I went there and I’m normally living in Samut Prakan .

You have to do it in the office downstairs, just bring the photocopies of the page needed in the passport , hand it to one officer and he comes back after 15mins with it done. (This was my experience 3 weeks ago by the way)

>4 days left before the due date (18 October)

I'm assuming you mean September 18th, right?

>Can I do it in Phuket?

I don't think you can, but you can try. The worse that would happen is that you'll be fined 2K THB each for not filing a 90 day report on time.