Follow the below to create mail merge labels:
Open Elite Practice Management.
Unmark all selected clients.
Search on the list and tick Home, Data Centre, Merge.
From the list of templates in Mail Merge select the template Assembly.
Print using Bypass Tray descending.
Select the option Perform Mail Merge.
Print using Bypass Tray (This could be your physical printer).
Insert labels into the printer facing down in the landscape tray.