I am at day 27 of my 60 day single entry tourist visa. I want to extend my visa at Samui, so I can stay 90 days. Because of Corona I want to do this as quick as possible. On what day will they allow me to come in and do this?
TLDR : Answer Summary
You can extend your 60-day single entry tourist visa in Koh Samui within the last 30 days of your current stay, ideally during the last 7 days if the immigration office is busy. Despite concerns regarding COVID-19, the standard procedures remain the same.