Oh! I didn't know that I'm not on any visa. The stamp I got in the end of March is completely same (just the date is different) with the stamps I got when I renewed my one-year contracts of my company.
Is it OK to cancel my work permit while I still belong to my company? According to your message, I should cancel it a week or so before July 15, but I am an employee this company until this day.
And one more question. How can I get "termination paperwork"?
Thank you for the reply, Tod! I really appreciate. My visa is based on employment from the immigration office. I was supposed to quit my job and leave Thailand in the end of March, but I couldn't because of covid-19. My company kindly extended my contract until July 15 so that I can stay in Thailand.