If you are on an actual visa you bought before entering Thailand you go to the Chaeng Wattana immigration office, but if you received a visa exempt 60 day entry then you go to IT Square Mall on the third floor at the Lak Si office. Those are your only options.
legal age for what? Nothing I am aware of has the legal age at 17 in Thailand, and I've dealt with this for over 20 years, living here for 14. 15 is a legal age for some things, 18 for other things, and 20 years old for most other things, but I've never heard of 17 being the legal age cutoff for anything.
well, with the right amount of money in your Thai bank account you can immediately change to a retirement visa extension without leaving the country, but that only applies if you are over 50. The big advantage is being able to legally get a work permit, and a number of other benefits not available at all to retirement visa extension holders. It is a very attractive visa extension for living here long term. As an example you can never apply for permanent residency, or citizenship, on a retirement visa extension. You can on a marriage visa extension. The financial requirement is cut in half also, but for someone thinking their marriage won't last, and is over 50, then yes.
There are no rules in place now so any changes made in the future don't concern you for the five years the visa is valid for. You are grandfathered in to any changes. That's how Thailand operates with something new, like this visa.
When you get any plan with True you are locked into that price for as long as you have it. It doesn't change in price, or services. My internet speed has increased over the years at no additional cost.
There is one area that you might be able to do that, but not as you only. The trade show industry does not require foreign sellers to get a business license in Thailand in order to be part of the trade show as a foreign seller targeting foreign buyers in the particular industry, renting space for your display.
When you get your new passport you simply take your old passport, and your new passport to immigration and they transfer everything over to your new one
I'm sorry. I actually thought you knew what an FCD account was used for. As you should know Thailand's main contributor to the GDP is export, and as such an FCD account is the cheapest way to bring money into Thailand. If you set it up right on both ends, the maximum fees for any amount transferred into Thailand is bt500. Then when you need to change it into baht it is done at the TT bank rate. It is not designed for taking foreign currency out of Thailand. Again, I am sorry. I mistakenly thought you knew that. I've been using my FCD account for the last 13 years, with no monthly fees, and only bt500 fee on both ends bringing in $100,000+.