Glad to have you here in the Community, @cpretorius14-gma.
You can turn on the Stock Tracking feature in QuickBooks Online (QBO) to manage your stock. However, this feature is only available in the QBO Plus version.
The Stock Tracking feature will help you track what's on hand, get alerts when it’s time to restock, and see insights on what you buy and sell. Also, this allows you to enter non-stock products and services so you can quickly add them to your sales forms.
Here's how to turn on stock tracking:
- Click the Gear icon, then select Account and Settings.

- Go to the Sales menu.
- In the Products and Services section, click the pencil icon to edit.
- Turn on Show Product/Service column on sales forms.
- Toggle both Track quantity and price/rate and Track stock quantity on hand to turn on the feature.
- Click Save, then Done.

I'm adding this article to for more details: Set up and track your stock in QuickBooks Online.
Just in case you'll need to adjust the stock quantity on hand in the future, here's an article you can read for the detailed steps and information: Adjust stock quantity on hand in QuickBooks Online.
I'm always here to listen if you have other concerns regarding QuickBooks features. You're welcome to post again or leave a reply below. Have a great day ahead.