Problem Registering Quickbooks desktop 2015 Pro

Hello, John R Taylor.
 

Thanks for joining us here in the QuickBooks Community. I'd be happy to guide you in the right direction.

Based on the information you've provided, the best course of action would be to contact our support team outside of the Community. They'll be able to verify your account details in a secure setting, as well as view your screen to better assist you. You can reach them by following one of the methods listed here. 

If you have any other questions, feel free to reach back out.

@John R Taylor 

You must contact Support to reactivate your license. Otherwise, you can use the trial version as a workaround.