Don't worry, there's another option to adjust the inventory quantity in QuickBooks, @golden2010. And I'm happy to share the complete steps with you. 

I understand how important it is to have accurate numbers of your inventory. I'll make sure that your inventory quantity in QuickBooks Online will match your actual products. This way, you can supervise your sales accordingly. 

Proceed as follows: 

1. Go to the Sales tab, then choose Product and services.
2. Click the small drop-down arrow perpendicular to your inventory item. 
3. Select the Adjust quantity button. 
4. Modify the quantity and complete the necessary details. 
5. Hit Save and Close. 

After saving, QuickBooks Online automatically records appropriate adjustments to your stock Asset and Cost of Goods Sold (under stock Shrinkage) accounts. To access this, follow the steps below: 

1. Go to the Accounting tab and select Chart of Accounts. 
2. Type Stock Shrinkage in the search box. 
3. Click Run report and customize them to see specific details. 

Furthermore, visit this article below to learn how to see your best sellers, what’s on hand, the cost of goods, and edit previous adjustments: 

• Edit a stock quantity adjustment
• Use reports to see your sales and stock status

Drop a line below if you want to know more about the QuickBooks ropes or other processes. I'm happy to help you again. Keep safe, golden2010.