So you just remain a UK tax resident. I HMRC will not care if they are getting money 🙂 As for Thai Tax Residency I do not know anyone whether retired or working overseas/remotely and remitting money into Thailand has been caught up in the Thai Tax changes announced later 2023 for tax year 2024. All of the fear, uncertainty, and doubt promoted by dodgy tax advisers and bedwetters has not come to pass. Things like not being able to renew visas, noit be able to leave the country and other ridiculous scare stories put out have been proven to be absolutely shyte. Anyone on a DTV should not be worrying about their Thai tax situation unless remitting multi-millions of Baht into a the country each year.
Anonymous participant 979 I have come in twice recently and never been asked for it - I pointed to my phone and asked if they wanted to see TDAC. Each time the IO just pointed at the screen. It pops up after the passport is scanned. Never printed it out but had it open on my phone. The people around me did not have it printed out either.
Do you not have to tell HMRC you are no longer a UK Tax Resident? It is a long time ago but I left in 1999 and did not tell them. Went back in 2000 and I got an earful for not telling them - still got a rebate. I left in 2002 again and told them by completing a form and never been a tax president in UK since.
There was no TM6 in February so you are good to go. Nothing to worry about. Fill in the TM6 replacement ie the TDAC up to 72 hours before return. No need to fill in departure info. Enjoy Vietnam.