Short Version
Navigate to Settings > Integrations > Connect QuickBooks and follow prompts.
Long Version
1. Navigate to Settings by clicking on the settings icon from the bottom-left part of the sidebar.
2. Navigate to Integrations and select Connect QuickBooks
3. If you have multiple QuickBooks companies, choose the company you want to connect, and follow the prompts.
4. Confirm the company name you want to connect to Flightpath and you're done!