this is immigration specific. Some immigrations allow you to skip the new registration when you return from inland travel in Thailand, others don't. In most immigrations however they insist that you register anew after returning from an abroad trip. Visit your immigration and ask how they treat it
your problem is, in the first year of the Non-Imm-O/A visa, you cannot cancel it by exiting. It is a "multi entry" visa type. you have to sit out the whole year until the visa validity has expired, Exit shortly before and re-enter after this date.
oops, sorry, I forgot the bilateral agreement with Brazil was extended from diplomatic passports to ordinary passports. YES, you will get 90 days, and you can do at least one border run that will get you another 90 days admitted stay
nobody needs any travel insurance for a 30-days visa exempt entries or a single entry 60 days tourist visa. It is neither a requirement for visa application, nor for entering Thailand. It is, however, strongly advised to have one - for your own protection
You spent two years in Thailand during a pandemic, this special time went with certain extra rules, which have been discontinued after Thailand opened for travellers, again
As a Brazil citizen, you are participating in the visa exemption scheme, you will be allowed for 30 days admitted stay, which you can extend ONCE on Immigration for 1900 THB fee, for another 30 days.
For Tourist visa (for a stay longer than what you can get by visa-exempt entries) and visa-exempt schemes, no more health insurance requirement are in effect, no more “Thailand Pass” and Covid19 checks.
However, as others here have emphatized – you should not travel abroad without a travel insurance that will cover fully any medical treatment and hospital stays due to illness and accidents
perfect answer! PERFECT! Thank you! I could not have written it any better! The point is: BEWARE of the cheap "onwardticket" method. Airlines since the beginning of this year are very reluctant in accepting them. Instead, you should buy a REAL cheap one-way flight ticket out of Thailand