I can share some information to help you with deleting the inventory shrinkage, @accounting-ygpso.

Inventory Shrinkage is an account automatically created by QuickBooks Online (QBO) once you adjust the quantity on hand on your inventory product. This is a default account that is used to record all the adjustments or changes you've made. 

I always suggest reaching out to an accountant when editing inventory adjustment entries.

You can use the Advanced search function in QBO to find and delete this transaction.

Here's how:

1. Go to the Search icon (magnifying glass) on the toolbar and click on Advanced search.
2. In the Inventory adjustment account drop-down, select the appropriate account.
3. From the All Transactions dropdown, pick Inventory Quantity Adjustment.
4. Click on Search.
5. Choose the adjustment that you need to remove and click on Delete.

For more information about Inventory Shrinkage, and how to edit or delete it, refer to this article: Adjust inventory quantity on hand in QuickBooks Online.

You can update an existing inventory quantity adjustment rather than create a new one. You may also make changes to the inventory or add new items as needed. See this guide for more information: Edit an inventory quantity adjustment.

After that, you can run reports to check what's your best sellers, what’s on hand, the cost of goods, or your inventory status: Use reports to see your sales and inventory status.

Let me know if you still need further help with deleting your inventory shrinkage. I'm always here to help. Have a great rest of the day!