How To Fix FKKINV399 - Cannot process tax items of source document &1 &2

SAP Error Message - Details

• Message type: E = Error

• Message class: FKKINV - Invoicing in Contract Accounts Receivable and Payable

• Message number: 399

• Message text: Cannot process tax items of source document &1 &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FKKINV399 - Cannot process tax items of source document &1 &2 ?

  The SAP error message FKKINV399 ("Cannot process tax items of source document &1 &2") typically occurs in the context of the SAP Convergent Charging or SAP Contract Accounts Receivable and Payable (FI-CA) modules. This error indicates that there is an issue with processing tax items related to a specific source document, which is identified by the placeholders &1 (document type) and &2 (document number).
  Causes:
  
  Missing Tax Configuration: The tax codes or tax configuration may not be set up correctly in the system.
  Inconsistent Data: There may be inconsistencies in the tax data associated with the source document, such as missing or incorrect tax amounts.
  Document Status: The source document may be in a status that does not allow for tax processing (e.g., it may be locked or already processed).
  Tax Jurisdiction Issues: The jurisdiction for the tax may not be defined correctly, leading to issues in tax calculation.
  Custom Code Issues: If there are custom enhancements or modifications in the tax processing logic, they may be causing the error.
  
  Solutions:
  
  Check Tax Configuration: Verify that the tax codes and related configurations are correctly set up in the system. Ensure that the tax types and rates are defined properly.
  Review Source Document: Examine the source document (identified by &1 and &2) for any inconsistencies or missing data related to tax items. Ensure that all required fields are populated correctly.
  Document Status: Check the status of the source document to ensure it is in a state that allows for tax processing. If necessary, unlock or change the status of the document.
  Tax Jurisdiction: Ensure that the tax jurisdiction is correctly defined and that the system can determine the appropriate tax rates based on the jurisdiction.
  Debugging: If the issue persists, consider debugging the process to identify any custom code or enhancements that may be causing the error. This may require the assistance of a developer or SAP consultant.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional guidance.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes such as FB03 (Display Document) or FBL1N (Vendor Line Item Display) to review the source document and its associated tax items.
  SAP Documentation: Refer to the official SAP documentation for FI-CA and tax processing for more detailed information on configuration and troubleshooting.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and to share solutions.
  
  If the problem continues after following these steps, it may be beneficial to reach out to SAP support for further assistance.