Hello! If it's your own fic: click edit and scroll down to "post to collections", type FWAE_Rec_list (it will say no suggestions found but it's okay, you can still add it.) Then go ahead and post.

If you are wanting to add someone else's fic: if a writer allows others to add to a collection there will be a "add to collections" button that you can click which will send a notification to the writer to approve or deny (type FWAE_Rec_list into the collections box. It will say no suggestions found but its okay, just add a comment or press enter to add it).

Hope this helped!