Thank you for joining the thread, LindaJ53. Allow me to lend a hand in registering an older QuickBooks product.

Have you tried following the steps provided above? As mentioned in the previous replies, with the QuickBooks Desktop Service Discontinuation Policy, older versions will no longer receive product updates and cannot access online services. 

You may need to contact our Customer Care Support to get a validation code to re-register the program. You can follow the steps provided by ZackE on how to reach out to them.

Additionally, check this article about fixing errors when registering in QBDT for future reference: Fix license, validation, and registration errors in QuickBooks Desktop.

Let me know if you have any other QuickBooks concerns by adding a comment below. I'd be glad to keep helping!