How To Fix FS870 - Internal error when determining tax amounts

SAP Error Message - Details

• Message type: E = Error

• Message class: FS - Messages from Tax Routines / Prenumbered Checks

• Message number: 870

• Message text: Internal error when determining tax amounts

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FS870 - Internal error when determining tax amounts ?

  The SAP error message FS870 ("Internal error when determining tax amounts") typically occurs during the processing of financial transactions, particularly when the system encounters issues while calculating tax amounts. This error can arise due to various reasons, including configuration issues, missing data, or inconsistencies in the tax determination process.
  Causes of FS870 Error
  
  
  Configuration Issues: Incorrect or incomplete configuration in the tax settings can lead to this error. This includes issues with tax codes, tax calculation procedures, or tax jurisdiction settings.
  
  
  Missing Master Data: If the necessary master data (such as customer/vendor master records, material master records, or tax classification) is incomplete or missing, the system may not be able to determine the correct tax amounts.
  
  
  Inconsistent Data: Inconsistencies in the data, such as mismatched tax codes or incorrect account assignments, can trigger this error.
  
  
  Custom Code or Enhancements: If there are custom developments or enhancements in the tax calculation logic, they may not be functioning correctly, leading to internal errors.
  
  
  System Bugs: Occasionally, this error may be due to bugs in the SAP system itself, especially if you are using an older version or have not applied the latest patches.
  
  
  Solutions to FS870 Error
  
  
  Check Configuration: Review the tax configuration settings in the SAP system. Ensure that all tax codes, tax calculation procedures, and jurisdiction settings are correctly configured.
  
  
  Verify Master Data: Ensure that all relevant master data is complete and accurate. Check customer/vendor records and ensure that the tax classification is correctly assigned.
  
  
  Analyze Transaction Data: Look at the specific transaction that triggered the error. Check for any inconsistencies in the data, such as incorrect tax codes or account assignments.
  
  
  Debugging: If you have access to debugging tools, you can analyze the program flow to identify where the error occurs. This may require the assistance of a technical consultant.
  
  
  Check for Notes and Patches: Search the SAP Support Portal for any relevant SAP Notes or patches that address this specific error. Applying the latest updates may resolve the issue.
  
  
  Consult SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP Support for assistance. Provide them with detailed information about the error, including transaction codes, configuration settings, and any relevant logs.
  
  
  Related Information
  
  Transaction Codes: You may want to check transaction codes like OBYZ (for tax code determination) and OB40 (for tax calculation procedures) to review your tax settings.
  SAP Notes: Regularly check for SAP Notes related to tax calculation errors, as they may provide specific fixes or workarounds.
  Documentation: Review SAP documentation on tax configuration and calculation to ensure compliance with local tax regulations.
  
  By following these steps, you should be able to identify and resolve the FS870 error in your SAP system.