Weird issue with billing contact.

When I go to xbox.com and click on my account, I then try to click billing contact information and it takes me to the login screen.

I enter my info, and it sends a code to my email, which I then input and sign in no problem.

But there’s no error message, it just keeps me at the login screen.

I can login at windows live all fine, but when I try to do it from xbox, I get

"PARENTAL APPROVAL REQUIRED

Your parent associated with this account must enter their Microsoft account to continue."

Can someone help