When you install QuickBooks, you'll need to enter your license and product number.
Don't know them yet?
To find your license and product number:
If you subscribe to a monthly or annual product subscription: You should have received an email with your QuickBooks Desktop license number and product code. If you haven't received this email, check your junk mail folder.
QuickBooks Desktop versions from too long ago aren't available for download. Because we can't ensure that older software will still run on modern systems, we don't support or offer downloads for those products.
In the Product Information window, verify the registration status next to the License number. If the status is Activated, you're all set!
If the status is Not Activated, select OK to close the Product Information window, then, from the Help menu, select Activate QuickBooks.
Follow the on-screen prompts to verify your information and complete the activation process.
In line with Intuit's discontinuation plan for older products, discontinued products cannot be registered for the first time. You can re-register discontinued products if they have been registered before and are being reinstalled.