Hello there, MKI1.

When you register for QuickBooks Desktop, you'll need to get a code from our specialist. This code is for validation when you register your product. Your address and postal code should be matched to recognize them in the system.
 

If you haven't contacted our support team, I recommend you to call our phone support team for further assistance. They can provide you the validation code and help you with the Postal code. Here's how:

1. Go to this link: What can we help you with?
2. Choose your QuickBooks Product.
3. Select your QuickBooks edition.
4. Click Continue

Just in case you're using QuickBooks Online, make sure you signed up for the correct region. The region of your QuickBooks account and postal code should be matched.

If you'd like to use the Postal Code option you have right now, you'll have to register and sign up for the right QBO version. Visit this link and scroll down to select the right country for you by clicking the drop-down arrow.

You can read the resources below for additional information about finding and fixing important details within your company file:

• Find license information in QuickBooks Desktop.
• Fix license, validation, and registration errors. 

 In case you get stuck and have questions, don't hesitate to reach back to me. I'll be happy to help you further. Have a good one!