UPDATE

Went to immigration on 15/2 to cancel the extension of stay. Just need to provide the letter from school, photocopies of all visa stamps in passports. Surprisingly no fines, maybe I am lucky?

Hi.

I have an extension of stay based on NON ED until 8 FEB 2022 from Bangkok immigration office. I left the country without cancelling my extension of stay at the immigration office.

I have the document from my school that stated I left in January. I will be entering Thailand via visa exempt from Malaysia again, Can I cancel my previous extension at Phuket Immigration (diff office)?

Any advice? Thanks!

I am on an extension of ED visa. The current extension expires in April. I will be abroad for 4 months, starting in March. Is the best thing to do cancel the extension before I leave? It is correct that it is not possible to just come back and re-extend it within Thailand?