I'm sorry if this has been asked before, but if you entered Thailand on a TR visa, can you extend it another 60 days, or only 30?
TLDR : Answer Summary
If you entered Thailand on a TR (Tourist) visa, you can extend it for an additional 30 days at the immigration office for a fee of 1900 baht. There was also mention of a COVID-19 amnesty option, which may allow for further extensions, but this requires getting a letter from your embassy before approval at the immigration office.