as my Thai bank account has been nominated by myself to show as an international transfer (FTT) for all transfers - if I send to other Thai accounts or for a different reason other than “long term stay in Thailand “ it can be instant - also the amount you send can also impact length of transfer to ensure no money laundering - it normally says in the transfer timeline that you hv been verified during transfer process - hope that helps 👍
when I went to my local tax office to investigate what is required for this year they did say a 12 month statement showing income would be required to calculate the tax owed - not just submitting a tax form - it is worth considering 🤷♂️