The immigr. At the airport didn't advise me on the T6, I need to extend now but I do not have it, what can I do? Thanks in advance for advise
TLDR : Answer Summary
If you need to extend your visa in Thailand but do not have the TM6 departure card, it's important to know that this card is currently suspended for air travelers. You do not need the TM6 to apply for a visa extension, so you can proceed without it.