You can see a list of all your active services on the My Services page. (You might be prompted to sign in with your Yahoo! ID and password before being able to access the page).
You can also navigate to the My Services page from the Yahoo! home page by following these simple steps:
If you do not see one of your active services listed in the main area of the My Services page, look for a link to more information about the service in the lightly shaded box near the bottom of the page.