ogrenadou

Hi guys, do you know the process of converting a Non-Immigrant B visa to a Non-Immigrant O-A within Thailand? I have been working in Thailand for many years under Non-B but now I am retiring I want to convert my visa to Non-Imm O-A when I stop working (1 year visa but preferably 5 years if possible). Can I do that without having to leave and re-enter Thailand? Has someone done that before? Thanks!