Update of XRechnung to the current version 2.1.1

Only for the german market: The version standard v2.1.1 for the creation of a digital invoice ("XRechnung") valid from 01 February 2022 has been integrated in PROAD, so that all "XRechnung" invoices created from this date correspond to the then valid version. Until 31 January 2022, a "XRechnung" will still be created according to the version standard valid until then. In order to be able to create a valid "XRechnung" from 01 February 2022, a previous update of PROAD is absolutely necessary.

The "Koordinierungsstelle für IT-Standards" (KoSIT) has published a new version of the XInvoice specification as of 07.02.2022.