How Time Tracker works with QuickBooks Track time. Syncs to QuickBooks. For detailed information on what syncs with your Time Tracker and QuickBooks connection visit ebillity.com/quickbooks or email firstname.lastname@example.org if you have specific questions about the QuickBooks sync. How Time Tracker works with Xero Track time. Generate invoices. Sync finalised invoices to Xero. For detailed info explaining how Time Tracker and Xero work together please visit ebillity.com/xero or email email@example.com if you have specific questions about the Xero sync.