Bottom line up front, this is what I experienced and the process I went through. Special thanks to ubonjoe for, as always, providing great answers to this forum.
- created an account on https://thaievisa.go.th/
- started the application process around 29 Nov and finished approx. 1 Dec. (I was told I needed to make a confirmed reservation for a one night stay at a SHA+ hotel).
- For my flight information, I only entered my flight number into Bangkok...admittedly, I didn't actual book the flight but only got the flight number for the date/time I expected to travel. I didn't see any requirement to upload my itinerary...read below to an email I got from thaivisa.go.th
- I uploaded the required documents as best I could understand and follow (according to the question/statement on the e-application).
-- One requirement was to upload your hotel reservation during your stay OR a letter from your relative "inviting" you to visit". Since I will be required to stay in a SHA+ hotel, I uploaded my confirmed reservation (for one night...I booked via agoda.com). Read below for an email I got from thaivisa.go.th
- I got an email on 5 Dec: (Pls submit the following via email:
[email protected] (subject "add docs") 1. copy of flight confirmation) I booked a one way ticket (I intend to extend my Non-O based on marriage for one year so I don't plan on returning via a roundtrip ticket), got the confirmation from the airline, and forward to the email as directed
- I got another email on 8 Dec: Can you also provide a support letter in Thai from your spouse? It can be written in Microsoft word or any note, indicating that she is inviting you to Thailand and providing an estimated period of time. Make sure that she signs at the bottom of the document as well. Thank you. Notice the email stated "in Thai". So I had my wife write a simple note (in Thai) inviting me to visit for a specific time period (in my case Jan thru Apr). I sent the note (attached to the email) back to them on early morning on 9 Dec.
- On 9 Dec (early evening), I received my approval.
Approved
Dear (my name)
We would like to inform you that your e-Visa application has been approved.....
- I actually don't recall but I vaguely remember at the end of the visa application I had an opportunity to "add" documents. I would suggest adding the itinerary confirmation, a letter from you wife/relatives (written in Thai) a short note inviting you to visit....nothing fancy or formal, just a "please come visit your family from Feb through April".
Again, this was my experience and wish you all the best of luck.