Actually the 180 day law has been in place since about 1978, it's only a slight adjustment which has sent expats into a frenzy. I don't know why. Basically it works like this for MOST people. If you've already paid tax in another country it's highly unlikely you'll pay in Thailand. In theory you *might* have to pay the small difference, but the tax office won't be spending thousands of baht chasing a few hundred (Stepping over dollars to pick up dimes). For retirees, most pensions can only be taxed in the country in which they're paid, so are exempt in Thailand. For those with dual tax residency, the country in which they have a permanent home and where most of their economic activities are carried out has sole taxation rights, so Thailand misses out. These are the conditions of Double Tax Agreements which ensure people won't have the sh*t taxed out of them. So to answer your question, most foreigners won't be paying any tax
There is no provision for an extension on the DTV. If it's still around you could possibly apply for a new one, but we're not going to know that for at least another four years, and there's always the possibility that previous holders may not be able to apply again. Too many unknowns. If you're looking at wanting to remain in Thailand forever, my advice is to look at other potential visas just in case you can't get another DTV
There's no such site, as every DTV application is different, and taxation is a personal situation, depending on your home country, where money is earned, if tax is paid etc. There's no "one size fits all" situation. You're better to just ask specific questions in this group
Jomtien might not accept postal notification. Might just be Bangkok due to the stupid location of the main immigration office. For many that live in the Bang Na - Asok precinct it's a long hike
You have to send it EMS. I've been doing it seven years or more, never failed once. Beats the crap out of hiking to CW and spending half a day there - but to each their own I guess! 👍
I assume the cat is dependent on you, so it will have to apply for its own DTV, although it's exempt having to show 500k in a bank account. It will not be able to catch Thai mice as this will be seen as working, and taking away the livelihood of a Thai cat