In order for our software to work properly and get all the needed data for the VAT returns calculation and filing, you need to give the software access to the Amazon reports. Usually this is done automatically when your are setting up the MWS connection. But in some cases you might get an error when setting up the MWS connection and this is the time when you should check the Amazon reports access rights.
1. Got to Settings → User permissions
2. Click on Manage Permissions
3. Check the reports sections to be set like in the image below: