Background:
Currently on Non-B visa (not extension) and in possession of work permit, living in Bangkok but working in Nakhon Pathom province. I have never had to register my TM30 yet for any previous extensions. It's time now to extend my visa.
My question:
Where do I go for my 1 year non-B extension and TM30 registration? Immigration in Nakhon Pathom (where I work) or Bangkok (where I live)? (p.s. My HR claims I can choose either one, but I'm not so sure they're right).