How do I handle departure details for the new Thailand Digital Arrival Card if I don't have them months in advance?

You don’t need to worry about having your departure details 5-6 months in advance for the new Thailand Digital Arrival Card (TDAC). The system only lets you register up to 3 days before your arrival, so you can fill in the departure info closer to your actual travel date. Just keep your travel and accommodation details handy for when you register within that 3-day window before you fly in. Departure info isn’t required way ahead of time, so no stress on that front! Just make sure to complete the TDAC online before you arrive to avoid any hassle at immigration

Doesn't have a Red Asteriks. You don't need to fill that section of the form

Then of course you can’t

Just leave it blank or pick a date as it is not binding

Departure information is not required