Thank you for posting here in the Community. I'm here to provide some clarification about printing an invoice in QuickBooks.
The information that shows when you print an invoice will depend on the sales form template. Please make sure to enable the Description box column from the Content tab.
Here's how:
Open the invoice.
Click Customise at the bottom, then select Edit current.
Go to the Content tab and press the pencil icon in the middle.
Put a checkmark on the box beside Description.
Hit Done.
Once done, you can open your invoice and ensure the correct template is selected (see screenshot below). After choosing the right one, you should be able to include the descriptions when printing the transaction.