Here's a few details about the requirement to register for a Tax Identification Number (TIN), which is mandatory for all tax payers in Thailand. Including those who spend more than 180 days per year in the country.
The tax talk starts at 4min 10secs.
TLDR : Answer Summary
This post outlines the requirements for registering for a Tax Identification Number (TIN) in Thailand, which is compulsory for all taxpayers, including expats who spend more than 180 days in the country. One comment expresses skepticism, suggesting the information may be promotional for tax agents.