Ok maybe there was a misanderstanding: I came in Thailand the first time in 2017, with a non imm ed visa of 6 months that ended at the end of december 2017. I flew out, came back first days of january 2018 with visa extend of 30 days, then back home 14 January 2018.
Now I am back, entered Thailand with non imm ed visa of 3 months on 21 of October 2018..
I've stayed here in Thailand in 2017, then came back home for more than 1 year...it is not my intention to live here in Thailand, I come here just to study (aka spending money).
If I leave the country on 11 December, the same day that my ed visa will expire, and go back on 14, can I get the 30 days visa extempion easily? Without going to the immigration office? Or I have to state anyway that I won’t study anymore?