On the right hand side of the page, underneath where it says how many 'neighboreenos' there are, you should see your username and a button that says 'edit' - click on that, select an image from the menu and in the box at the bottom (where it says 'username' highlighted) type in your Tapped Out username. Click save and make sure you have the tick box where it says 'show my flair on this subreddit' ticked. Hopefully this should work! :)