QuickBooks Online (QBO) doesn't have a license number like QuickBooks Desktop. Instead, it uses a Company ID (CoID) as your unique identifier for managing your account, sweetsensation.
To find your Company ID in QBO, you can use the following steps:
Go to the Gear icon in the upper right corner.
Select Account & Settings under Your Company.
Choose the Billing & Subscription section on the left side. You can see your Company ID number above your subscription plan.