Hello, there. I'm here to help you find an alternative solution for incorporating inventory management software with barcode scanner into your QuickBooks Online (QBO). 
 

The feature you're looking for is unavailable in QBO at this time. What I can suggest for you is to integrate a suitable third-party application through the App Center that can effectively manage and track your inventory.

You can follow the steps below:
 

1. Go to the App Center.
2. Once you're in the page, type the name of the app in the search bar (you can enter keyword or category).
3. Select the app and click the Get app now button.
4. Follow the on-screen steps. 

Or you can navigate to the Apps menu in your QBO account. Here's how:
 

1. From the left menu, select Apps.
2. Go to the Find apps section.
3. Enter the name of the app in the search bar or you can click the Browse category drop-down.

Once you find the app, you can now download it.
 

In a addition, to learn more about efficient management of all third-party apps in QuickBooks, check out this article: Transfer app ownership or disconnect or disconnect apps in QuickBooks Online and Accountant. 
 

If you have further questions or concerns about integrating the third-party application to QuickBooks, please don't hesitate to add them in the comments below. We're always here to help. Have a good one.