The following 4 videos give you an introduction to the Xero integration, explain how data moves between to the 2 platforms, describes how to set up the integration, and how to create invoices and bills between Katana and QuickBooks Online
Note: The videos show an old Katana UI. You can now connect to Xero from the Integrations Marketplace (puzzle piece icon in top toolbar)
Introduction
How data moves between Xero and Katana
Integration setup flow
Create Invoices and Bills