I had the above problem: The "Click to Add a Tag" line was unexpectedly missing from the Note header. I could find nothing in the forum or Help, or online to rectify this. Eventually I discovered that there is a 'switch' in the view menu: "Show Note Info (f8)" - clicking this brought up the missing tagging line and doing it a second time brought up another line of info about the note including 'Created by', Location, Source URL, etc. Clicking a third time dismissed all this helpful stuff. Can the Evernote team please give this important issue a mention in the help section - thanks Guys! Perhaps add the word 'Tagging' to the View menu item ( "Show Tagging & Note Info (f8)") This would make it more likely discoverable.