There are Electronic Point of Sail (EPOS) systems that integrate well with both retail and online bookings to QuickBooks Online (QBO), @LOPorterdale.
While I can't suggest applications to integrate, you'll want to discover them from the Apps menu. This will help you identify third-party applications available that suit your needs.
Here's how:
- Sign in to your QuickBooks Online account.
- Go to the Apps menu on the bottom left of the navigation bar.
- Type the app you want to connect to QBO in the search bar or use the Browse category dropdown to search by category.

You can also visit our supported apps website: Apps help QuickBooks run better.
For more details about adding and managing apps in QBO, see this article: Install and use apps in QuickBooks Online Accountant.
If you need help with bookkeeping in QuickBooks Online, feel free to reach out to the Community forum. We're here to assist you.