How do I find my license number and product key.

It's my pleasure to help you locate your license and product number, owner7516-theups.

You can only find them in QuickBooks Desktop versions by pressing F2 on your keyboard. I've attached a screenshot for your visual reference:

Since you're using QuickBooks Online, you only have the Company ID instead. You'll see it on your Billing and Subscription page.

1. Go to the Settings icon and select Accounts and settings.
   
2. Choose the Billing and Subscription tab. 
   

Check  this article on how to manage your QuickBooks Online: Manage billing , payment, and subscription info in QuickBooks Online.

You can always get back to this thread if you have questions about managing your account.