Running a small business means that you often have to fill orders for your products and services. I can see how having a link to buy your products or services would be really handy. I'd be happy to explain the options you have when using QuickBooks Online.
The feature that best describes what you're looking for is QuickBooks Payments. Payments allows your customers to pay you directly from their invoices. When an invoice is emailed to your customer, they'll see a "Pay Now" button, where they can process a payment using Visa, MasterCard, Discover, or Apple Pay. Here's more information about QuickBooks Payments: Accept Payments Online.
If that's not exactly what you're looking for, you can also explore the third party apps that you can sync to QuickBooks Online here: Apps.
I hope this helps you get back on the right track. If you have any other questions about this, please feel free to reach back out to me here.
Hi Darl. Dealing with error messages can be time-consuming but I'm here to help. I appreciate you sending the screenshot and the link. To fix this, I recommend clearing cache and cookies on your browser. Clearing cache and cookies cleans your browser and fixes most website issues. Here's a detailed article which shows you how to: Clear cache and cookies to fix issues when using QuickBooks Online. Give this a try and let me know how you make out.