Do I need to provide flight details when applying for a 90-day retirement visa in Thailand?

When I did my first one, the departure airline was demanding return flight. Thai gov didn't care.

If you are getting the non O for retirement you don’t need an exit ticket out of Thailand.

Just got mine a month ago and only needed a flight number in .

Is the single entry the only option? It was the only choice in the dropdown on the website application. I'd like to get the 90 day non-O, come over for a week or two to get the bank account and do a little more house hunting, then go back to Vietnam for 2 months (where I'm currently living) , then head back and get the 1 year extension. I also have a Vietnamese wife I will need to get a dependent visa for. What would be the correct process for this, aside from me coming over on the 90 day, spending the whole time in Thailand, getting the 1 year extension, then the wife's dependent visa, THEN bringing her over?

Not need onward ticket

Electronic visa is your proof also

90 day non O doesn't require a return flight its classed as a long-term visa .

Arrived on 60 day auto visitor visa, left return flight blank on TDAC as not a required field, no issue

Ps Cambodia land borders are currently closed

You should be able to just look up the flight your thinking of using and supply the flight numbers without making a booking. Once you have the visa you shouldn't need an onward ticket, one way should be fine