We don't currently support direct Expensify integration, but you can create a CSV file from our software, and then edit it to be compatible to the format listed here:
https://community.expensify.com/discussion/645/how-to-import-expenses-reports-from-excel
If that doesn't work for you, we're also planning to add direct integration in a future update. You can contact us at support@smartreceipts.co to find out what's the status on that front.