Hello, I've lived in Thailand for several years and will soon be switching from a work permit and non-Immigrant B visa to an ED visa. I have asked language schools if I can switch visas without exiting Thailand and re-entering on a tourist visa, and have gotten varying responses. Does anyone know if this is possible to switch visas while in Thailand? If I do have to leave and re-enter on a Tourist visa, would there be any issue with immigration since I've lived here on a non-Immigrant B? Thanks for any advice