I have the DTV Visa and planning on getting an extension at Bangkok immigration whilst out there but I cant find out what documents I need. In the past with the 60 day tourist visa I got a 30 day extension. I just needed to fill out a form, bring passport, passport photos and pay a fee. Is it the same when getting a 180 day extension with the DTV? Also after getting the extension and almost staying out there for a year can I do a border run instead of taking a flight home?