Thanks for reaching out to us, JH83.

Allow me to provide a little information concerning inventory in QuickBooks Online.

Normally, once you Create a Sales transaction, it's shown automatically the inventory selection. 

To successfully track inventory and know more about how QuickBooks handles inventory assets, please check out this article: Understand inventory assets and cost of goods sold tracking.

I'll be right here to continue helping if you have any other concerns or questions about QuickBooks. Assistance is just a post away. You have a good one.