I’d like to express my appreciation for taking the time to post in our QuickBooks Community forum, @Alex480.

Please note that upgrading your QuickBooks Desktop 2021 software will have an impact on your business's historical data. After May 31, 2024, all 2021 versions of QuickBooks Desktop Pro, QuickBooks Desktop Premier, QuickBooks Desktop for Mac, and QuickBooks Enterprise Solutions v21 will be discontinued, along with other Intuit products.

 If you choose not to upgrade your QuickBooks Desktop 2021 by May 31, 2024, you will no longer have access to live technical support, and you won't be able to integrate with any of the other Intuit services. This includes QuickBooks Desktop Payroll, QuickBooks Desktop Payments, and online bank feeds. Discontinued versions won't receive the latest critical security patches and updates. This also means you won't receive critical security updates protecting your data starting June 1, 2024.

Products affected by service discontinuation after May 31, 2024

• QuickBooks Desktop Pro 2021
• QuickBooks Desktop Premier 2021 (General Business, Contractor, Manufacturing & Wholesale, Nonprofit, Professional Services, and Retail)
• QuickBooks Enterprise Solutions 21
• QuickBooks Premier Accountant Edition 2021
• QuickBooks Enterprise Accountant 21
• QuickBooks Desktop for Mac 2021

You can check out Learn how features and data move from QuickBooks Desktop to QuickBooks Online for more details on how your data is moved.

I hope our conversation has been helpful. If you require any more support or have any questions about your QuickBooks Desktop upgrades, feel free to comment below anytime. Have a pleasant day!