What TM30 form should I use for my 90-day reporting in Thailand after staying at multiple locations?

Read the website of the local Immigration office which documents you need at that office.

The latest stay which is the only one currently 'Live".

You use the current TM30 from where you are NOW (when you are going to file a 90 day report)

That's the one that shows you're staying at the address you're going to put on the TM47 application for 90 day report form

In Bangkok you go to the main immigration office at the government complex (Building B) out on Chaengwattana Road. You want section A (the 90 day report room)

Realize you're going to be there a WHILE, a friend went the other day got there at 9AM and got queue 256 for the 90 day report.. (they were on queue 20 😮 )

OR

You can go to Bumrungrad Hospital 10th floor business center and for 650 they'll take your passport out to Chaengwattana and file a 90 day report for you, and you pick up the passport a few days later