I don't think you will see it until the next billing cycle. If you look at when your bill is normally due, it will proably show up the day after the due date of your bill.
But- you would probably get an answer by calling 1-800 comcast Billing Department and ask the for the current status. They should be able to bring up your Account ledger on their end. The ledger is different from what we, the customers see online.
Hope this helps,
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.