Bought a Microsoft Home Office 2024 from Best Buy. I need help with installing it

The different country shown after entering the product key means the key is tied to that country or region. Office product keys must be redeemed in the country or region where they were purchased.

Because the key is showing a different country than the one currently used, this is treated as a region mismatch. In this situation, the next step is to contact Microsoft support so they can review the key and advise on options.

Use this page to reach support and provide the product key and purchase details from Best Buy: https://support.microsoft.com/contactus/

References:

• Get help with product key errors on Office.com/setup
• Office product key error "This product key isn't meant for your region"
• Where to enter your Office product key