I have a 60 day visa and need to extend it for 30 days. Can I do it at the Immigration Office? If so, when I do, is it added to the 60 days or does the 30 days time clock start on the day of extension?
TLDR : Answer Summary
Yes, you can extend your 60-day visa for an additional 30 days at the Immigration Office. The 30 days will be added to the end of your current 60 days, and you will not lose any days by applying early, as the extension will commence on your current visa's expiration date.