Hello @DancinBear,
Thank you for posting here in the Community. I can help you get in touch with the necessary support team for the non-supported product's registration.
We provide customer support for registration and licensing for older versions of QuickBooks Desktop under Intuit's standard terms and conditions. However, please note that we can only assist if the data is still available in the system.
We can't guarantee we'll be able to register, provide key codes, or offer data and password recovery for older versions of QuickBooks. You can call us using the contact information found in this link (scroll down to Why can't I install QuickBooks Desktop from an inactive subscription?): QuickBooks Desktop service discontinuation policy and upgrade information.
For additional reference, I've attached a link you can visit to resolve errors when you enter product and license numbers in QuickBooks: Fix activation, license, and product numbers errors.
Keep me posted if you need more assistance with the QuickBooks registration or the installation. Have a great day.
