1) The original poster marked the issue as solved.
2) Start on the page linked to by Bruce.
Scroll down the page. Click View or print full bill (pdf)
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This is done to protect customers and for assurance that they are dealing with a Comcast employee. Non-Authorized Employees are allowed to post but cannot state they are employees nor can they allude to being employees.
The billing address where you send your paymenbt differs through out the US.
You can go into your Account and can view the Bill online. If you scroll down, you will come to the billing address (it looks like the front of an envelope)
Sign in with your PRIMARY Username and password
Click My Account
You are directed into Customer Central
Click on the Billing & Payments tab
You will see a small blue link near the top that says" View or print PDF of bill"
You bill will come up as a PDF file. Scroll down to the 'envelope' for the address you need.
Need Email Help? Please post the following information in your post. Do you use XfinityConnect? The Full or Lite version? Do you use an email client? Which one? (Eg; Windows Live mail, Outlook, a smartphone etc.) Which browser/version do you use? And- have you cleared your browser cache? Which operating system? XP, Vista, Windows 7, Mac OS X Details of the problem you are having.