Format of Model 770 report is updated for the 2019 reporting.
Official format instructions are announced on the portal: https://www.agenziaentrate.gov.it/portale/web/guest/schede/dichiarazioni/7702019/modello-7702019unificato
To apply the changes for Microsoft Dynamics AX 2021 R3, you need to download KB 4567648
The functionality of Modello 770 is updated and now allows you:
1. For Model 770 report to manually enter Sending identifier and Declaration progressive that tax authority has assigned to your declaration after submission.
2. For Corrective or Integrative declaration type, to select the declaration that is corrected in the field Corrected declaration. Sending identifier and Declaration progressive fields will be filled from the corrected declaration accordingly. You can manually change numbers if needed.
This information is also exported to electronic file according to the official guidelines.
You can find more details on the functionality for Modello 770 in the topic: https://learn.microsoft.com/en-us/dynamicsax-2012/appuser-itpro/ita-create-and-export-the-model-770-report-as-an-ascii-file