Now you can synchronize your data between QuickBooks Desktop and Bitrix24.
Install the QuickBooks Desktop Integration app.
Install the WebConnector. (https://developer.intuit.com/docs/0200_quickbooks_desktop/0100_essentials/quickbooks_web_connector).
Enter the password that will be used for synchronization and configure initial settings for synchronization (types and templates for addresses, selection of payment systems, selection of your company in Bitrix24*).
Download the bitrix24.qwc file from the integration app. The link will be available in the QuickBooks Desktop Integration app.
Upload the downloaded file to the WebConnector (File > Update Web Services > the Add an application button in the opened window).
Save the settings in QuickBooks Desktop Integration.
*Note. Please configure your company details to sync the invoice data with QuickBooks Desktop (CRM > Settings > My company details). Find more details at: https://helpdesk.bitrix24.com/open/5870771/