How do I extend my tourist visa in Thailand, and when should I apply for it?

I’d get it at least 3-4 days before, your 60 days are up, incase of mistakes, and you have to go back.

BUT …. it will be granted on that day if all ok , so your 30 day starts on that very day ok .

What Graham has shown you is correct take cash, they will only accept the cash.

You might also on the bottom of the form, to save time when at the counter , write your gps coordinates, of where you are staying/living, as they will ask you, to open your phone on maps , and show them, also your phone number . (Remember to take the TM30).

You don’t need to pay an agent, it’s so simple , check where the office is, if in your town, as you may need to go to a different area, as it might be somewhere else in a nearby town.

Pdc visa service good 👍