Do I need to change my daughter's education visa when assuming guardianship in Thailand?

@Andrew ******

I found that too :/ , I didn't see where it says they issue a Non-Immigrant Type O visa based on supporting a foreign child enrolled in school here. :(

I would certainly contact the thai consulate in Hong Kong because I just looked and didn't see the requirements to even get a 90 day single entry Non-Immigrant Type O visa based on supporting a foreign child in thailand.

Make sure they even issue that visa and that you know the documentation to take to apply for it if they do.

You'll get a 90 day single entry Non-O visa, and when you come in you'll get stamped in for 90 days.

IF you need to leave during that time you need to get a re-entry permit BUT it will not add any time to the 90 days you got stamped in for.

When you have 30 days or less left on that 90 day stamp you go to the immigration office and apply for a yearly extension by meeting the financial requirements and turning in the documentation they require to issue it. It will go under consideration for 30 days and then you go back to get the year extension inked into your passport and at that time you'd get a multiple re-entry permit which would allow you to exit/re-enter for the entire year.