Hello! I am a teacher. I have given my school notice that I am leaving. They said THEY will hand a form into the labor office and then the labor office will give them a form. This seems to contract what other posts have said- should I make sure I go to the labor office?

After I go to the labor office, how much time do I have before I have to leave the country? I am thinking about doing a land boarder crossing in Mae Sai and plan to come back into Thailand for about 3 weeks on a tourist visa.

I plan to continue traveling after the 3 weeks on the Thai tourist Visa in other parts of SEA and would like to book my flights now. I'm worried I'll have difficulty at the Mae Sai. Thanks for any help!