ERPnextAustria VAT declaration reports

I would like to use the ERPNextAustria module for submitting VAT declarations.

I have defined some VAT accounts in the ERPNextAustria Settings.

However, when I click on Get Values in a AT VAT Declaration I only get filled the 000 Revenue field, all other fields remain 0.

Do I need to define additional AT VAT queries? How are they constructed? An example in the WIKI section would be nice to have @lasalesi .