How do I submit the first 90-day report for my retirement visa in Thailand, and can I do it online?

And most likely you don't have a Visa but a one year extension.

Don't forget to get the reentry permit: one or multiple if you leave Thailand and intend to come back...

The very first 90-day report must be submitted at the local immigration office that serves the address on your current TM30. Your office MIGHT accept reporting by EMS. Check with your local office about this.

After the first report, you can report online as long as you keep staying in Thailand, except in cases below:

- the first report after travelling outside Thailand (<- most offices require reporting at the local office, not online. You need to check your local office policy)

- the first report after you get a new passport (<- online reporting system doesn't support passport changing)

Your addresses on 90-day reporting online (TM47) and the newest TM30 must match. Update your TM30 if needed.