How To Fix F1326 - Posting with withholding tax is not possible with obsolete modification

SAP Error Message - Details

• Message type: E = Error

• Message class: F1 - FI Function Module Messages

• Message number: 326

• Message text: Posting with withholding tax is not possible with obsolete modification

What causes this issue?

The modification from SAP Note 672040 is implemented in your system.
This modification applies up to and including EHP6, which means that
unlike the standard behavior, the sending system of an ALE scenario
calculates the enhanced withholding tax base amount and saves it in the
FI document.
As of EHP7, SAP Note 672040 is obsolete. If you want to continue to use
the functionality outlined, you need to use the modification from SAP
Note 1821352.

System Response

The document cannot be posted.

How to fix this error?

Remove SAP Note 672040 from your system and implement SAP Note 1821352
instead.
SAP Note 1821352 has not been released generally; please contact SAP by
creating a customer message (component FI-GL-GL-M).

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message F1326 - Posting with withholding tax is not possible with obsolete modification ?

  The SAP error message F1326, which states "Posting with withholding tax is not possible with obsolete modification," typically occurs when there is an issue with the configuration or the data related to withholding tax in the SAP system. This error indicates that the system is trying to process a transaction that involves withholding tax, but the necessary modifications or configurations are outdated or no longer valid.
  Causes:
  
  Obsolete Modifications: The error suggests that there are modifications in the system that are no longer supported or have been marked as obsolete. This can happen due to system upgrades or changes in the configuration.
  Incorrect Configuration: The withholding tax configuration may not be set up correctly, or there may be inconsistencies in the tax codes or tax types used in the transaction.
  Missing Updates: If the system has not been updated with the latest patches or notes from SAP, it may lead to compatibility issues with the withholding tax functionality.
  Data Issues: There may be issues with the master data (e.g., vendor or customer records) that are related to withholding tax.
  
  Solutions:
  
  Check Modifications: Review any custom modifications related to withholding tax in your SAP system. If they are obsolete, consider removing or updating them to align with the current SAP standards.
  Review Configuration: Go to the configuration settings for withholding tax in the SAP system (Transaction code: OBWW) and ensure that all settings are correct and up to date. Verify that the tax codes and types are properly defined.
  Update SAP Notes: Check the SAP Support Portal for any relevant notes or patches that address this issue. Implement any recommended updates or corrections.
  Master Data Review: Ensure that the vendor or customer master data is correctly set up for withholding tax. Check the withholding tax types assigned to the relevant master records.
  Consult Documentation: Refer to SAP documentation or help files for specific guidance on withholding tax configuration and troubleshooting.
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP Support for further assistance. They can provide insights based on the specific version and configuration of your SAP system.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OBWW (Withholding Tax Configuration), XK02 (Change Vendor), and FK02 (Change Customer) to manage and review configurations and master data.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Documentation: Review SAP Help documentation for withholding tax to understand the requirements and configurations needed for proper functionality.
  
  By following these steps, you should be able to identify the root cause of the F1326 error and implement the necessary solutions to resolve it.