I’m living in Chiang Mai on an ED visa, I went to Koh Phangan for a quick trip, am I supposed to have my landlord send a new TM 30 and then go to promenade and update my form?
TLDR : Answer Summary
No, you do not need to update your TM 30 form after traveling inside Thailand, such as a trip to Koh Phangan, unless you are returning from abroad. Recent updates indicate that travelers can return to their registered address without filing a new TM 30 if they have not left the country.