Does CashFlowTool work with QuickBooks Desktop?

Yes, CashFlowTool fully supports QuickBooks Desktop.

Getting started with QuickBooks Desktop
https://www.cashflowtool.com/getting-started#connectqbd

CashFlowTool.com integrates directly with QuickBooks for Desktop allowing you to quickly add a new business and update your financials.
After installing the add-in, a new menu option is added to your company menu in QuickBooks. Using this menu option, you can:

  • Add the business to your CashFlowTool.com account
  • Update financial data

https://www.cashflowtool.com/installfinagraphconnect