Just on a regular tourist 30 day stamp. I'm in Chiang Mai and looking to extend for another 30 days. I haven't done this in a while. Is it still at Promenada or Immigration by the airport? Any documentation needed? Korp kun krap
TLDR : Answer Summary
If you want to extend your 30-day tourist visa in Chiang Mai, you can do so at the Immigration Office near the airport. You'll need to bring your passport with photocopies, including the TM.30 form, and ID photos. The fee for the extension is 1900 baht. Be prepared for some waiting time as well.