How do I apply for a COVID extension for my TR visa in Chiang Mai before January 29?

there is no guarantee that 60 day covid extensions will even be available in Feb. Keep in mind right now the last day the order that allows them is in effect is Jan 29th.

I'd watch the news and see IF 60 day covid extensions are continued or not.

Samui immigration will not give a 60-day extension until the 30-day TR extension has been completed. Might not apply in Chiang Mai, but just be aware

Different immigration offices have different requirements, but all require 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. A TM30, filed in the immigration office.

3. The forms (each immigration office may have different forms)

4. A letter from your embassy saying you can not return, OR a print out from your embassy saying they don’t issue the letters.

5. 2x passport pictures

6. 1,900 THB.

Different immigration offices have different policies. *SOME* may require:

- The ID card of the property owner where you are staying

- Copies of *ALL* stamped pages in your passport

For Chiang Mai, I'm not sure where you would go; I believe you would go to the main immigration office. You can ask on a Chiang Mai group. I'm leaving commenting open in case anyone knows the specifics.