Hi there, @tammyrfontaine.
Let me get the help you need about the printing issue of your customer's invoice.
Are the two (2) pieces of paper showing the same content of the invoice? If yes, the printer may be set up to print 2 copies of the invoice. If no, it's possible that you have too much information that requires a two-page invoice.
To know more about creating and sending an invoice in QuickBooks Online, see this article: Email or print multiple invoices and sales forms.
For additional reference, you may find below links helpful:
However, if you mean something else, please let me know by commenting below. I'll be looking forward to your reply. Have a nice day.
