Thanks for reaching out to me here in the Intuit Community, @michele7.
I'm delighted to let you know that you can customize your quote by enabling the payment term feature. This way, the term will appear on the form.
Here are the steps you can follow to achieve this:
If you need to add another payments terms, just open this link for the detailed steps: Set up payment terms.
I've also added an article whenever you want to customize multiple forms in QuickBooks Desktop: Use and customize form templates.
Keep in touch if there's anything I can help you with QuickBooks. I'd be glad to help.