Hello @chris_n_karen.
I definitely relate to the importance of seeing your bill online, it is a fantastic convenience when it works! It will be my pleasure to help!
What happens when you try to access your bill on a different browser or device? Does it still now show your bill online? One thing you can try is clearing the cache and cookies of the browser you are using, close all the windows, and then log in again.
I am also sending you a private message to your Forum’s Inbox to gather more information. Please keep an eye out for my message.
Thank you for reaching out to the Community Forums! Have a marvelous day!
Katie, AT&T Community Specialist