These are known as EriC (Elster Rich Client) libraries. Initially Java-based program components were provided by the tax authority, now only fully compiled program components (C libraries) are provided. The software manufacturers can integrate these components into their products to minimize the implementation effort. To support manufacturers when creating software products for communication with the tax authorities, the tax authorities have also been providing software components since the introduction of electronic communication. This model allows for a clear distinction between the software solutions involved and the parties responsible. The solution is referenced to as an “open interface” in the ELSTER environment. The standards used for the signature and encryption were published by the tax authority, as is the case for social insurance, and it was made possible for the software manufacturer to implement and deliver all components for the transfer using its own program components in its software solution. The signature, encryption, and transfer of the data from the employer’s network to the clearing house is done using the middleware. From this system, the data is then transferred to the middleware used (Business Connector, PO/PI, or Cloud Integration). The XML file is generated in the HR or FI system. The data is then transferred to the clearing house of the fiscal authority block. Technical background: For the transfer, the data is summarized in an XML file, signed, and encrypted. In the areas of HR (employment tax notification (LStA), employment tax statement (LStB), electronic employment tax deduction features (ELStAM)) and FI (advanced return for tax on sales/purchases (UStA)), electronic reporting data is transferred to the clearing house of the fiscal authority block for communication with the tax authorities. Furthermore the current restrictions are listed. In the blog the End-to-end configuration and the monitoring options are described, links to further information sources are given. The adapter is planned for the March-24-2019 update. This blog describes the Elster ERiC libraries used in the new Elster adapter provided in SAP Cloud Integration.
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