Thank you for posting here in the Community, Mark9992. 

There are different ways to know your QuickBooks license number and product code.

• If you bought it from a retail store, kindly look for the brightly colored sticker on the original CD envelope.
• If you bought it from our website, you'd received an email with your purchase confirmation and product details.

Aside from that, you can view it in your QuickBooks by pressing F2 on your keyboard. On the other, you can visit the Customer Account Management Portal Site (CAMPS). 

You can read through these articles for more insights: Use the Customer Account Management Portal Site (CAMPS).

You may also check these articles for additional reference on how to download and install QuickBooks Desktop. 

Keep me posted if you have any other questions about installing QuickBooks. I'll be always happy to help you. Have a wonderful day!