How To Fix NAA051 - Item &2 of supplier billing document &1 does not have an input tax code

NAA051 - Overview

• Message type: E = Error

• Message class: NAA - Subsequent settlement (Purchasing)

• Message number: 051

• Message text: Item &2 of supplier billing document &1 does not have an input tax code

What causes this issue?

Item &V2& of supplier billing document &V1& does not have an input tax
code. Updating of business volumes in subsequent settlement is not
possible without an input tax code.

System Response

Business volumes cannot be updated.

How to fix this error?

This situation should never arise.
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Error message extract from SAP system. Copyright SAP SE.

NAA051 - Details

• The SAP error message NAA051 indicates that there is an issue with the input tax code for a specific item in a supplier billing document. This error typically arises when the system expects an input tax code to be assigned to an item, but it is missing. Here’s a breakdown of the cause, potential solutions, and related information:
  
  Cause:
  
  Missing Input Tax Code: The item in the supplier billing document does not have an input tax code assigned. This can happen if the tax code was not specified during the creation of the billing document or if the item is not configured correctly in the system.
  
  Configuration Issues: The tax configuration in the system may not be set up correctly, leading to the absence of a valid input tax code for the item.
  Document Type Settings: The document type used for the supplier billing may not be configured to allow for input tax codes.
  Item