Edit your name in these areas...
My Contact Details - To edit your name in an IM box...
My Account Information - To edit your Account Information....How are people getting my last name from my Yahoo profile. How do I change/remove it?You have to click the box that makes your last name private or invisible to others, can't remember which.How are people getting my last name from my Yahoo profile. How do I change/remove it?its not on your yahoo profile, so i have no clue