Lonnie, I'm living in Chiang Mai on a non-O retirement visa. It's renewal date is October and I started my application for the LTR visa on the 24th of June. I presented my latest tax return and the other items required on application. So far I've been asked only for invoices relating to my health insurance which I bought for living here anyway. I'm also still sending to my bank each month the required 65k bath just in case I am refused the LTR. Should I be accepted, I'll ask for it to start when my current retirement visa expires.
Would be interested to know people's thoughts on completing the departure information for holders of Non-O retirement visas? I'm returning to my apartment in mid May and have flight booked but no idea when I'll be departing next. Just fill in a placeholder the day before the expiry of my current visa in October? Although I'll likely make several more sightseeing trips away before then.