I wouldn’t worry about it mate , I got to BKK on Sunday , they weren’t even checking them , I even said do you want to see my TDAC and the woman said no it don’t matter .
, you mention the old paper form you used to fill out on the plane ? I’ve arrived many times from the US via Korea , Taiwan or Japan and have never filled out any form on the plane ? I’ll still figure on doing the TDAC form online though , I guess .