How many days do I have to leave Thailand after my Non-B visa and work permit are canceled?

Well your visa is related to the work permit .. you can go to cancel your visa and ask for extension if it was not the first time you can get one or try to get the Covid extension.. then you have 60 day …

>cancel my Non-B visa

A visa can not be cancelled. However, a visa is a sticker placed in the passport and allows a person to stay in Thailand for 89 days on entry. Generally, most people get an extension of stay, which is connected to the work permit.

ASSUMING a person does not cancel the extension of stay or work permit in advance, a person must leave Thailand OR get another extension by 11:59PM the same day, otherwise you will be on overstay. If you are going to have your work permit or extension of stay cancelled before November 26th [Thanks for the correcting,

@Wannikea ********

], you can apply for a 60 day extension of stay based on unable to travel due to COVID-19.

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, 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.

5. 2x passport pictures

6. 1,900 THB.