no they dont require masks, but who cares. It's not a big deal to wear a mask. It's common courtesy to wear one in much of Asia when someone has a cold or cough.
You can apply in many different countries in that situation.
It doesn't matter where the company is registered or located (except a Thai company of course or registeredin Thailand) as long as you can show that you're allowed to work remotely and be able to stay in Thailand without any issues.
My company is in USA and registered in USA, I flew to Taipei from Thailand just to apply for the DTV, then flew back to Thailand the same day that I received the DTV.
Yes. They asked if I got a new visa, I answered yes and they entered the new DTV info into the system ( mine was a page sticker type) and they said welcome to Thailand
Taipei only requires to show current balance has the 500k baht (each) not an ongoing balance over time. Move money into your accounts to have the funds. Take the other balances as extra info if you want.
They will also look at your bank statement to see the income coming in to show you can support yourself.
Finally, you will want to write a letter from your company to describe what you do and that you work remotely.
be careful... this advice is not accurate for every country. Some countries require citizens to pay taxes in their home country no matter where their residence is.
For example - US citizens pay federal income tax on global income no matter where they live. There are some exceptions, ways to avoid, and loop holes but this is the basic level for average citizens. If someone works for a US company then federal taxes will be withheld. If a US citizen works for a foreign company they are required to report foreign income as well.
Thailand is looking to implement new tax laws that tax income of foreigners staying longer than 180 days in a calendar year but the details aren't finalized on what income will be included, how to calculate, etc. Either way, Thailand and USA have a tax treaty that allows taxes paid to USA to offset the income taxes here. So if the Thai tax rate is higher then would sill likely need to pay, if Thai tax rate is lower then no payments but still need to file.
But once again, the details of the tax changes have not been finalized. It's kinda crazy that they might implement something that is based on previous year rather than future years.