We know the official announcement from 2023, but to date (as of September 2024) there is no concrete information from the authorities on how taxpayers are recorded, whether and how much taxes are to be paid, how double taxation agreements are taken into account... and what steps need to be taken . Why? The responsible authorities themselves don’t know (yet). This is not an assumption, but is based on the fact that, according to its own statement, the responsible ministry still has to examine the details and procedures.
Stay relaxed, it will take a long time until clarity becomes clear. The decision-making processes in Thailand take time and are subject to constant change. Do not do anything, for example to apply for a tax number (TIN) from a tax office. Many foreigners are currently doing this, but they are usually simply turned away. So don't let the media unsettle you. Many reports are based on guesswork and even publish incorrect tax calculation examples.
Source: (in German only) immo-th.com/aktuell-einkommensbesteuerung-fur-auslander-in-thailand-german-version/