Hi there, @JC5970.

I'm here to answer your questions about upgrading to QuickBooks Desktop 2024 and guide you on how you can purchase a new license for it. 

Yes, the link you currently input is the official website to download QuickBooks Desktop 2024. You can download the app and use it if you have already purchased a license.

Here are the answers to your following questions:

• Your existing QuickBooks Desktop Pro 2021 will be soon discontinued after May 31, 2024.
• You'll get full product support, excluding services that need to have a subscription, such as QuickBooks Payments and QuickBooks Desktop Payroll. You can learn more about the discontinuation of QBDT Pro 2021 through this article: QuickBooks Desktop service discontinuation policy.
• Yes, QBDT 2024 is an annual subscription-based product.
• Better features are added to QBDT 2024 compared to an earlier version of QBDT Pro 2021. You can check this article to learn more about its new features: What’s new in QuickBooks Desktop 2024.
• You can contact our support to purchase a QBDT 2024 annual subscription by going to the QuickBooks Desktop Help/Contact Us tab.
• While Intuit provides tools and support to help migrate data from older versions to newer ones, there are limitations on the data that can be transferred. I recommend backing up all your important data before upgrading to ensure nothing vital is lost during migration.

While upgrading to QuickBooks Pro 2024 offers high potential benefits in features and functionality, it is crucial to be mindful of the data migration process and seek support to ensure a smooth transition without losing important information.

After upgrading, you can consider using item categories in your new QuickBooks Desktop Enterprise 2024. This feature helps you categorize your inventory items to keep your items organized.

We always value your business needs and keep our services up-to-date for everyone's benefit. You're always welcome to post here on the Community page if you need additional assistance upgrading to QBDT 2024. I'm always here to assist you.