Accessing linked accounts

I have a personal Xfinity account and linked another account of a family member to it. I set my personal account as the default. When I log in I can see both accounts in the Account pull down. If I select the second account (the one that is not the default), I am taken to the Linked Accounts page. From there, I see these options for the second account

• Make this Default
• View Details
• Unlink

If I select View Details, I can see the account number, the Nickname and the Service address. I do not see a way to go into the second (non-default) account and manage it. How do I do that?