That box you are referring to should be filled out if you need to change your SS info. You said you already filled your info out when you signed up. Then there is no need for you to do it again.
I do not remember exaclty if i had fill that form up. But i thought i already provided them my tax information and i expect to see something showing up on that page. It just makes me feel uncomfortable seeing that page blank as this is my first time getting a check pending.
So i was thinking of posting here to ask for more information.
Are all the other publishers getting the same blank page?
You fill out the form when you need to change your info.
So unless you need to change your info, don't worry. The form is supposed to be blank.
The reason you don't see your info there is for security. Imagine if someone got your password. That would do damage to your Yahoo account, but the damage would stop there. If your info was visible, they could steal your identity as well as your YPN account.