CoE is a two stage process. For stage 1 you will need to upload passport, visa, vaccine certificate (because you mention SHA rather than ASQ I’m assuming that you’re vaccinated?) and Covid insurance cover together with any other supporting documents required by your local RTE (eg bank statement - RTE London didn’t ask for this at stage 1 but am aware that some US RTEs do) this is considered and all going well pre-approval is granted. You then have 15 days to upload your flight and hotel booking confirmation. Then book your Covid PCR test so that your results are received within 72 hours of arrival in Thailand. You will need paper copies of everything at your departure airport so make sure you print it all off and have to hand at the airport. Hope this helps!
thx Bobby. I had heard that you can get a further 1 year stamp on your O-A on like the day before expiry - makes it a good option for us. The health insurance I can live with - we need to have it here too (in reality). Do you happen to know if all four of us can get in on the O-A? Only my husband meets the age requirement. . .