The current QuickBooks Desktop integration does not support Split Tender payments, but you can try Commerce Sync to connect your QuickBooks Desktop and Square accounts. Tips for Integrating with QuickBooks Desktop If your Square account is already connected to QuickBooks Desktop, learn more about the integration. You can use the Commerce Sync App to connect your Square and Desktop accounts. If you’ve never integrated your Square account with QuickBooks Desktop, you won’t see this app listed in the Square App Marketplace. Integrate with Intuit QuickBooks Desktop via Commerce Sync