With your email confirming your account information you will receive a pdf file of the Avery 94103 Label Template with the labels outlined in black. You can print this to use as test label stock to verify that your printer setup prints out the labels without cutting off the barcode.
Before printing out your template verify that your paper guide are right up against the paper as tight as possible while keep the paper flat. If the paper loads a little bit skewed the template will be off and will not work as a test label stock.
To print this pdf file,
Opening up the file in Adobe Acrobat
Click the printer icon or go to File Print in the menu
Select your printer
In the Page Sizing & Handling section of the printer dialogue, select Custom scale and enter 100.
If you have a duplexer you can uncheck print on both sides.
Click print.
When you print your test labels on the test label paper, you can but it on top of a page of labels and hold it up to a window or light box and verify that your test label stock pages up to the actual labels.