How do I delete contact information?
Deleting a contact only removes the information from the Address Book. It has no affect on other areas of Quicken (for example, the Memorized Payee List, Bill & Income Reminders List, or Customer and Vendor Lists (Quicken Business & Personal only).
Choose Tools menu → Address Book.
Select the group that contains the address or addresses you want to delete. (Optional)
Select the contact information that you want to delete.
Click Delete.
Click OK.