Hello, DeeCh. 

Thanks for dropping by the Community space. In QuickBooks program contains an "Add/Edit Multiple List Entries" option that allows users to change multiple entries within an account in a single window, helping eliminate the potential for entry errors and speeding up the editing process. You can edit customers, inventory, non-inventory parts and service items lists that you have already entered into your QuickBooks data. 

To edit the group, follow the instructions in this article: Add and edit multiple customers, vendors, and items. 

Don't hesitate to comment below if you have other questions with QuickBooks Desktop. Take care and stay safe.