@Saw ***********
if you are not going to use an Agent to get a Retirement Extension of Stay at your local Thai Immigration Office = obtain your 1–Year Extension of Stay yourself, then you need to open a Thai Bank Account and get ฿ 800,000.- Thai Baht ( ฿ 800k Baht) in your Thai Bank Account and have that in your Thai Bank Account for at least 2 months before applying for a Retirement Extension at your local Thai Immigration Office