If a customer's email address changes, be sure to update
it in the Edit Customer window. This ensures that QuickBooks enters the correct
"To" address when you send invoices, statements, or estimates by
To do this task
Click Customer Center.
Click the Customers & Jobs tab.
Double-click the customer whose email address you want to
On the Address Info tab, enter the new email or Cc address.
Changing your company's email address