Specify a tax code for reverse charges

What causes this issue?

You can specify a tax code for reverse charges for processing parked
documents that do not contain a unique tax code.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Tax codes for reverse charges are input tax codes in which the total of
tax amounts balance to zero. This is why the EU tax code needs to have
the value 5, 6, 7, 8, or 9.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.