This tutorial will show you how to connect ServiceM8 to your QuickBooks Online account. Ensure that you login to your ServiceM8 Online Dashboard (i.e. the we-browser interface) using your PC or Mac.
In the Online Dashboard, go to Settings

Click 'ServiceM8 Add-ons'

Find and click the QuickBooks Online Integration

Click 'Connect'

Review & click 'Connect'

Once complete, click 'Continue'

Click 'Finish'

That's it! You've now successfully integrated your ServiceM8 and QuickBooks Online accounts! Read about how the connection works here.