How To Fix FF806 - Tax base amount is negative

SAP Error Message - Details

• Message type: E = Error

• Message class: FF - FI Function Module Messages

• Message number: 806

• Message text: Tax base amount is negative

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FF806 - Tax base amount is negative ?

  The SAP error message FF806, which states "Tax base amount is negative," typically occurs during the processing of financial transactions, particularly in the context of tax calculations. This error indicates that the system has encountered a negative value for the tax base amount, which is not permissible in the context of tax calculations.
  Causes:
  
  Incorrect Data Entry: A negative amount may have been entered incorrectly in the transaction, leading to a negative tax base.
  Reversals or Adjustments: If a transaction was reversed or adjusted, it might have resulted in a negative tax base.
  Configuration Issues: There may be issues with the configuration of tax codes or tax calculation procedures in the system.
  Posting Errors: Errors during the posting of invoices or payments can lead to negative amounts being calculated.
  Custom Code: If there are custom developments or enhancements in the system, they might inadvertently lead to negative tax base amounts.
  
  Solutions:
  
  Review Transaction Data: Check the transaction that triggered the error. Ensure that all amounts are entered correctly and that there are no negative values where they shouldn't be.
  Check for Reversals: If the transaction is a reversal, ensure that it is processed correctly and that the original transaction is still valid.
  Tax Configuration: Review the tax configuration settings in the system. Ensure that tax codes and calculation procedures are set up correctly.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on handling tax-related transactions.
  Debugging: If the issue persists, consider debugging the transaction to identify where the negative value is being generated.
  Consult with SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as FB60 (Enter Incoming Invoice), FB70 (Enter Outgoing Invoice), and others that may be related to the transaction you are processing.
  Tax Codes: Understand the tax codes being used in your transactions and how they are configured in the system.
  SAP Notes: Check for any SAP Notes related to error FF806, as there may be specific patches or updates that address this issue.
  User Exits and BAdIs: If your organization has implemented custom logic, review any user exits or BAdIs that might affect tax calculations.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.