, you need an OA as you say, then an extension based on retirement. Unless you have a fetish for bureaucracy and spending long periods sat in government offices, I would highly encourage you to engage an agent. It’s all possible alone, but getting a bank account before you have a visa, which you require to apply for the visa, is the ultimate Catch-22. Some people manage it, bless their socks, but many more try and fail.
All joking aside, if you’re in the Chon Buri province I would highly recommend
and that’s the truth. However, some people manage to get a bank account on a tourist visa. My personal advice is to pay an agent, it will cost you about 30k THB and they will do all the necessary paperwork etc, or you can try and do it yourself and roll the dice.
, non O 3 month and 12 months extension based on retirement, multiple entry and cash bank deposit. 90 report is 500 baht, although I have not had cause to use that yet.