FreshBooks is an accounting software that enables you to track invoices, expenses, and time.
Within Teamwork, you can choose to export an invoice in a project to your FreshBooks Classic account.
Note: The FreshBooks integration is available on per-user Deliver subscriptions and above.
You will first need to enable the FreshBooks integration in your site settings.
Go to the Finance area of your project and select the Billing subsection.
Select the relevant invoice from the left pane to view it.
You can choose to export both open and completed invoices.
In the bottom left of the invoice, you will have an option to Export Invoice.
When you select export, you will see the export options available. Select the Export to FreshBooks option, and click Export.
You can either log this as a new invoice or add it to an already created invoice.
For more information, see: Enabling the FreshBooks Integration for Your Site