How could I import the sales data from Square to my quickbooks desktop?

Hello there, @elephonellc.

Please make sure you've met the system requirements when using the app. You can check to QuickBooks Desktop Application center if your app is applicable to import to desktop.

You check the attached article below for more information: https://desktop.apps.com/home#!category/10368/6960

Also, in case you want to learn some tips on managing your QBDT software, you can visit our Help articles page for reference.

If you have any other questions, don’t hesitate to comment below.

@elephonellc 

Utilize one of these 3rd party importer tools

https://transactionpro.grsm.io/qbd

https://partners.saasant.com/affiliate/idevaffiliate.php?id=5051_2

Hope it helps.