Thanks for getting back to the QuickBooks Community, havre57.
Currently, QuickBooks Desktop doesn't have a feature to export the item list information to mail merge. You'll need to open each item and manually print it.
However, you may want to check a third-party application by visiting this website https://apps.intuit.com to see if there's an option of exporting the item to mail merge.
Please know that you're always welcome to post if you have any other concerns. Have a good one.