You can edit or delete a note that you posted on your own profile. You can't edit notes other people leave on your profile, but you can delete them. To edit or delete a note. go to My Profile and click Notes. Find the note you want to edit or delete, hover over it, and click Edit or Delete.
Once you submit a note on someone else's profile, you cannot go back and edit or delete it. You can contact that person and ask them to delete it, but they can't edit it.