@Békefi *********
Extended there myself recently. You will need copies of passport photo page, last entry stamp, tm6, visa and all previous extensions and a picture. The guy at the copyshop outside of immigration knows and you can just give him your passport. Don't bring in your own forms like someone suggested. I did this but it wasn't exactly like the 1 they had so they made me fill out theirs instead. You won't need any paper copy of a tm30 application either. Just make sure where you are staying has registered you with immigration before you go. Samui is the easiest place in the country to get covid extensions. No under consideration period, 1900 baht. In and out in an hour.