You cannot select product checkboxes when you print labels from the invoice screen
After you select the Print Labels button in the invoice screen, ezyVet shows a Select Products To Print Labels For dialog box. Each product shown in the dialog box has a checkbox. If you select a checkbox, ezyVet will print a label for the product.
ezyVet does not have the necessary label template set in its system settings
A practice manager or a person with the necessary administrator permissions must do these steps.