Hello there, @Indika.

QuickBooks Online (QBO) doesn't have a license number only a Company ID. I'm here to guide you on how to find it.

Here's how:

1. Go to the Gear icon.
2. Below the Your Company section, select Account and Settings.
3. Choose the Billing & subscription.
4. You can see your Company ID number above your subscription plan.

Also, you can check this article to learn how to manage your QuickBooks Online account:

• Change your email, user ID, or password for QuickBooks Online.

The Community is one post away if any help is needed relating to the QuickBooks Online account. Take care and have a wonderful week!