Hello there, shadab1 and ITimpel. 

Thank you for taking the time posting in the Community. Allow me to help and share some information about activating QuickBooks.  

Let me address first @shadab1's concern. For incorrect license or product number error, we need to ensure that the numbers are entered correctly.

To do that, I recommend calling our Technical Support. This way the phone agents can check your account and verify if the product information matches on what you have. They can also help you get to a resolution quickly to register QuickBooks. 

You can call them by following the steps provided by my colleague, @MichelleT. 

For @ITimpel question, let me share some additional troubleshooting steps to help you get past this error.  To begin, let's verify that the system date and time settings are correct.

Here's how: 

1. Close QuickBooks Desktop.
2. Right-click the time display in the Windows taskbar, then select Adjust Date/Time.
3. Select the Date & Time tab, then set the date for the current year.
4. Select Apply, then select OK.

After that, let's try to activate QuickBooks again.  

Here's how: 

1. Click the Help menu.
2. Select About QuickBooks.
3. Press Ctrl + R + P on your keyboard.
4. Enter the Validation Code.
5. Click Next to complete the activation.

If you get the same result, I recommend checking this article for more solutions: The validation code and product number is incorrect or the service is temporarily unavailable when a....

For additional help, please reach out to our Technical Support. They can initiate a screen sharing session to help you get to a resolution quickly. Just follow the steps provided by my colleague, @MichelleT. 

That should do it. Drop a comment below if you have any other questions about activating QuickBooks. I'd be happy to help you out.