To export your data to your accountancy software your account needs to be integrated first.
This can be done by logging onto the main Receipt Bank website and accessing your 'Account Settings' menu in the top right.
From there open the 'Integration' tab, click on the link to change your add-on and select it form the list. Then follow the steps to finish integration.
When using the mobile app you can check that your account is integrated and that you have the correct permission to be able to publish your receipts by tapping on the Main menu, then the 'Settings' Cog, then tap on your account name and it will tell you what your integration is.
When integrated you can publish your items from the Mobile app once they are 'Ready for Export' by opening the item. "Publish" button is at the bottom.