Hallo. I am in Thailand on 45 day exm, living in Bangkok Bangna. Which office I get the 30 day extension? I read here not all offices giving it? Thank you for your help.
TLDR : Answer Summary
To obtain a 30-day extension for your 45-day visa while living in Bangna, Bangkok, you should visit the IT Square Immigration Office. It is important to confirm that you are in the correct jurisdiction, as Bangna is near the boundary between Bangkok and Samut Prakan. The extension will cost around 1,900 Thai baht, and you can make an appointment through the provided links.