No tax code for input tax distribution is assigned to &1 &2

What causes this issue?

The system cannot process multilevel tax codes during posting of input
tax distribution.

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?

You have to assign an input tax indicator in Customizing to each
multilevel tax code that is used for input tax distribution.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.