Hi there Ronlou101,
Thanks for reaching out about registering your QuickBooks Desktop software. It's a great program able to assist in keeping track of sales and expenses so you know the profitability of your company. I can point you in the right direction for assistance with errors while registering your software.
For help with registering your QuickBooks software if you have an error, I recommend reaching out to the QuickBooks Desktop support team outside of the Community. They'll be able to look up your account in the system to be able to help register the program to be used to manage your books. You can reach them using the options provided in the QuickBooks Desktop support policies.
if you have any other questions, feel free to reach out here.