With the QuickBooks Desktop integration you can now bulk export invoices from all your projects to a single Intuit Interchange File (.IIF), which can then be imported in your QuickBooks Desktop client. Note that only QuickBooks Desktop 2018 US-version is supported. Contact us if you have a different version or format which you need exported to.
In order for a tax code to be attached to an invoice, it has to be created on the QuickBooks Desktop integrations page. In order for QuickBooks Desktop to accept the tax code, it has to have the exact same name and rate.