First, consult your Operation Manual to make sure that your machine can run labels, and confirm from which tray they need to be run. (Generally, labels should be run from the bypass tray, but there are some exceptions.) Then, follow the instructions on how to set up your tray. Remember, if you are printing labels as opposed to copying labels, you will need to select the appropriate paper type in both your print driver and your copier. Make sure you are inserting your labels in the correct orientation (face up or face down). This will vary from machine to machine.