Requirements

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Select Administration → Modules from the main navigation and click Create
Select Module name Tax Balance
Set Root URL to <your-taxbalance-url>
Set Login URL to <your-taxbalance-url>
Set Api URL to <your-taxbalance-url>/api
Select Id token JWS algorithm RS265
Click Save and remember the Client ID and Secret for later configuration steps

Tax Balance configuration

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Set "backendUrl" to <your-taxbalance-url>/api
Set "hubsUrl" to <your-taxbalance-url>/hubs
Set "openIdIssuer" to <your-portal-url>
Set "openIdClientId" to the Client ID from the previous registration process
Set "openIdDummyClientSecret" to the Secret from the previous registration process

Tax Balance heavily relies on the so called XBRL taxonomies provided by "XBRL Deutschland e.V.".

If the application server blocks connections to remote ressources, e.g. https:\\de.xbrl.org please perform the following steps:

XBRL cache folder is configured in appsettings.json (located in the application directory) by setting the XbrlFileCachePath property. The default setting is C:\temp\
Extract this ZIP archive to the preceding location
You may want to change the location of the cache folder
Ensure that the IIS AppPool user has permission to read and write that specfic folder.