Currently, QuickBooks doesn’t offer a built-in payment link feature for customers to pay online, Simon. But, you can explore third-party applications that can help you create payment links.
Simply go to the Apps menu in QuickBooks and select Find Apps, then search for "payment link" to find suitable options.
Please see the photo for preference

By the way, we also collaborate with trusted partners like PayPal, GoCardless, and Zettle by PayPal, which allow your customers to pay online seamlessly.
If you have any additional questions, please don't hesitate to reply. We're here to help.