Why wait until the end of your extension of stay when you can do it 45 days before expiry in Phuket? You don't lose any day when you do your extension early. While you are preparing your document, do remember that all copies must be in portrait format. I gave them a google map to my condo in landscape format for easy reading. No, they wanted a small portrait format one eventhough you can hardly read it. I usually provided a photo of me standing in front of my condo as there is only a plain door going into my apartment. This time, the IO asked me to print out the house number (as given in the address of my unit) in large font size (150), paste it on the door and take a photo of me standing in front of the door. He put a note on my pile of document stating that I should provide this photo when I collect my new extension. Every year, new surprises.