Hello again, All Brands Group.

Thanks for adding a screenshot and sharing to us the result. I want to ensure you can set up the items properly in your account.

The resolution steps provided by my colleagues should help enter the products correctly in QuickBooks. To narrow down the issue, let’s perform the same steps again to check if the issue is with the setup or item.

Here’s how:

1. Go to List at the top menu bar, then select Item List.
   
2. Click on the drop-down for Item, and choose New.
   
3. Under Type, select Inventory Part.
4. In the Item Name/Number field, enter Parker as the parent item.
   
5. Fill in the necessary fields.
6. Click OK.

To create the sub-item.

1. Go back again to the Item List page.
2. From there, click on the drop-down for Item, then choose New.
3. Under Type, select Inventory Part.
4. In the Item Name/Number field, enter Parker 03501179532097.
5. Mark the box for Subitem of, and select Parker.
6. Enter the Manufacturer’s Part Number.
7. Select the correct income account, then click on OK.
   

If you can successfully add sub-items, you'll have to inactivate the ones that don't work and create a new sub-item.

1. Go back again to the Item List page.
2. From there, right-click beside the product's name and select Make Item Inactive.

In regard to the Barcode feature, this is currently available in the Platinum version for QuickBooks Enterprise. If you’re subscribed to this plan, you’ll have to activate the Advanced Inventory option before creating a barcode.

By following these steps, you should now be able to set up the product with its sub-items.

Keep me posted on how this goes after following these steps. I'll be here to keep helping.