I had an interesting return from Vietnam last week in to Donmeung. When I went to fill out the new TDAC I had a problem and couldn't finish it because a.) I have a 15 month retirment visa and live here and b,) I had no flight booked leaving the country.

I finally found a nice immigration chap that helped me so for anyone who may be in this situation you do the following. Date of leaving will be the last day of your retirment visa and onward flight will be the same number as you left the country on, (The immigration offical litteraly told me to make one up!!!!)

Hope someone finds this useful!!