How To Fix FKKTAX021 - Non-deductible tax: error if +/- signs differ (see long text)

FKKTAX021 - Overview

• Message type: E = Error

• Message class: FKKTAX - Free Tax Code

• Message number: 021

• Message text: Non-deductible tax: error if +/- signs differ (see long text)

What causes this issue?

You want to post a document that contains items with different
positive/negative signs. However, the tax items were all summarized in
one item.
The tax code used was assigned a percentage in Customizing for
non-deductible input tax.

System Response

Error message

How to fix this error?

You have two options: Post the items in separate documents according to
whether they are positive or negative. Or also enter the tax items with
different positive/negative signs, since otherwise it is not possible
for the non-deductible tax to be assigned correctly.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

FKKTAX021 - Details

• The SAP error message FKKTAX021 indicates a problem related to non-deductible tax, specifically when there is a discrepancy between the signs of the tax amounts in a transaction. This error typically arises in the context of tax calculations in financial documents, such as invoices or payment processing.
  
  Cause:
  The error occurs when the system detects that the sign of the tax amount does not match the expected sign based on the transaction type. For example, if a tax amount is expected to be positive (indicating a tax charge) but is recorded as negative (indicating a tax credit or deduction), the system will trigger this error. This can happen due to:
  
  Incorrect configuration of tax codes.
  Manual entry errors in the transaction.
  Issues with the tax calculation logic in the system.
  Mismatched settings in the tax determination process.
  
  
  Solution:
  To resolve the FKKTAX021 error, you can take the following steps:
  
  
  Check Tax Code Configuration: Ensure that the tax codes used