@Charies_M

Please learn from this input.

@integrityNO2

You have at least two Other places to look.

If this is Windows 10, settings = Do Not Let Windows manage my printer.

In QB, File menu > Printer Setup, Invoices, set it to 2.

In Customize Templates, this Invoice, Additional Customization, the Print tab, set it what you want, and set it to Use Printer Setup, or perhaps you have a specific template that is always 6 needed, so set it here, as Custom.