The new version 3.1.0 for the "Payroll" desktop API has been available since “Jahreswechselversion 17.0”.
For pilot users, API version 2.0.3 will be discontinued with version 18.0B in April (delivery 18.04.2024). With the summer DVD 18.0 in August 2024, only API version 3.1.0 will be supported and API version 2.0.3 will no longer be supported.
Developers who are migrating from version 2.0.3 to version 3.1.0 can find a guide here: Migration guide | Payroll documentation | DATEV Developer Portal
All further details on the new version can be found here: Changelog | Payroll Dokumentation | DATEV Developer Portal.