Hello, viola.

Let me share an idea on the stock tracking capabilities in QuickBooks Online. 

QuickBooks Online (QBO) Plus can track stock quantity, sales revenue, and cost of goods sold. 

When you create a stock, you have the option to enter the initial quantity on hand as of a specific date. Also, when a stock is sold, QuickBooks will automatically update the quantity and record the sales and the cost of goods. 

This article explains more information about stock tracking capabilities in QBO: https://community.intuit.com/articles/1388946.

You can leave a reply if you have more questions with the features in QBO. Thanks!