Hey there, @Jowonio_Finance. 

Welcome to the Community! 

If you don't upgrade your QuickBooks Desktop 2021 by May 31, 2024, you won't have access to live technical support if you run into problems or any of the other Intuit services that can be integrated with QuickBooks Desktop. 

For more details and information check out this guide: QuickBooks Desktop service discontinuation policy. 

I'm only a post away if you need for any further questions. Have an amazing day!