The Customers & Jobs list is alphabetized by default, based on how
the names are entered into the list.
To alphabetize the Customers & Jobs list by last name,
the Customer Name field must show last names first.
For example, to add
a customer named Joan Green, enter Green, Joan in the Customer Name field.
If you did not enter a customer with last name first, you can
edit the customer to change the Customer Name field.
Click Customer Center.
Click the Customers & Jobs tab.
Go to the View menu at the top of the window and
click Re-sort List.
Click OK to confirm that you want QuickBooks to re-sort the list
Reorganizing a list
Removing customers by combining, hiding, or deleting them