Do you use Quicken Mac or Quicken for Windows? US or Canadian
version?What version, edition level and release of Quicken are you using?
Click Help / About Quicken (Mac: Quicken / About Quicken) to get this
What version of Windows or Mac OS are you using?Which Quicken Bill Pay service are you referring to? An old one from several years ago, or the new one provided by Metavante?
What error messages do you receive?
As a shot in the dark, maybe this will help:https://www.quicken.com/support/removing-account-quicken-bill-pay-service