@Christopher ********
> and with many things that could go wrong
There's nothing that can go wrong with getting a 60 day extension of stay based on unable to travel due to COVID-19, as long as you bring in these documents:
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. 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. 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. [I KNOW Nakhom Pathom immigration requires this document, Nonthaburi may as well]
5. 2x passport pictures
6. 1,900 THB.
If the immigration office is busy, and they want to process the 60 day extension of stays 7 days before they are due, then it's what they want.