You can create new inventory items and make other changes in the QuickBooks Online test account, gerdgoebel.

However, it automatically resets with its original data every time you log out or close the session. Can you tell us exactly what happened when you tried to add an item? Did you get an error message, or did the item just not save?

Please note that the Inventory adjustment feature in QBO allows you to change the item's quantity on hand to help you track the changes to your physical inventory. However, it does convert bulk inventories to ounces since Unit of Measure is not yet supported in QBO.

Here's how to access it:

1. Click the + New button and select Inventory qty adjustment.
2. Enter the Adjustment date.
3. Choose the appropriate shrinkage or adjustment account in the dropdown list for Inventory adjustment account.
4. For each item, enter either a new quantity or a change in quantity.
5. In the Memo field, enter the details about the adjustment.
6. Click Save and close.

Here's an article about this for more details: Adjust inventory quantity on hand in QuickBooks Online.

Don't hesitate to reply to us again if you have more questions for us.