Can I extend my Thai tourist visa for another 30 days after a 60-day visa and a 30-day extension?

You can apply for a 60 day extension of stay based on unable to travel due to COVID-19. Bring the following:

1. Your passport and:

a. a copy of your data ("picture") page

b. a copy of your most recent visa (if you have one)

c. a copy of your most recent stamp

d. a copy of your departure card

2. [May not be asked at Bangkok Immigration] A TM30, filed in the immigration office.

3. The forms (each immigration office may have different forms, and want to use their special forms)

4. [Might not be asked at Bangkok Immigration] A letter from your embassy saying you can not return, OR a print out from your embassy website saying they don’t issue the letters, OR a print out of a letter from the embassy saying they don't issue those letters. [Read it carefully! Does it make sense? No. But it's what they want]

5. 2x passport pictures

6. 1,900 THB processing fee.

You may also be asked to show a flight out of Thailand as well.

You can apply for the 'unable to travel due to covid' extention. There's no other extention to the SETV after your 30 days extention.