How To Fix WS102 - Tax amount entered differs from that calculated by system by & &

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 102

• Message text: Tax amount entered differs from that calculated by system by & &

What causes this issue?

The system found a discrepancy between the tax amount entered and the
tax amount calculated by the system.

System Response

Tax calculation is not possible.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WS102 - Tax amount entered differs from that calculated by system by & & ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WS102 - Tax amount entered differs from that calculated by system by & &
  
  Cause:
  This error occurs when the tax amount manually entered in a document (such as an invoice or billing document) does not match the tax amount calculated automatically by the SAP system based on the tax codes, rates, and base amounts.
  Common reasons include:
  
  Manual override of tax amounts that do not align with the system's tax calculation logic.
  Differences due to rounding issues or currency conversion.
  Incorrect tax code or tax rate assigned.
  Inconsistent tax base amount or incorrect tax calculation procedure.
  Customizing or configuration issues in tax calculation settings.
  Differences in tax jurisdiction or tax condition records.
  
  
  Explanation:
  SAP calculates tax amounts based on the tax codes assigned to line items, the tax rates defined in the system, and the base amounts (net values). If a user tries to enter a tax amount that differs from this calculated amount, SAP raises this error to prevent inconsistencies and ensure compliance with tax regulations.
  The placeholders & & in the message typically show the difference amount or the values involved, helping to identify the discrepancy.
  
  Solution:
  
  
  Check the Tax Code and Tax Rate:
  
  Verify that the correct tax code is assigned to the line item.
  Check the tax rate associated with the tax code in transaction FTXP or relevant tax customizing.
  
  
  
  Review the Base Amount:
  
  Ensure the base amount for tax calculation is correct and consistent with the document values.
  
  
  
  Avoid Manual Overrides:
  
  Do not manually enter tax amounts unless absolutely necessary.
  If manual entry is required, ensure it matches the system calculation or adjust the tax code/rate accordingly.
  
  
  
  Check Rounding Settings:
  
  Review rounding rules in tax customizing (transaction OBQ1 or related).
  Adjust rounding differences if they cause minor discrepancies.
  
  
  
  Recalculate Tax:
  
  Use the "Recalculate Tax" function in the document to let SAP compute the correct tax amount.
  
  
  
  Check Currency and Exchange Rates:
  
  Verify that currency conversions are correct and consistent.
  
  
  
  Review Customizing:
  
  Check tax calculation procedures in transaction OBYZ or FTXP.
  Ensure tax condition records are properly maintained.
  
  
  
  Use SAP Notes and Support:
  
  Search for relevant SAP Notes if the issue persists.
  Sometimes, patches or updates fix known tax calculation bugs.
  
  
  
  
  Additional Information:
  
  This error is common in countries with complex tax regulations or multiple tax rates.
  It helps maintain data integrity and compliance with tax laws.
  In some cases, the error can be bypassed by customizing the system to allow manual tax entry, but this is generally not recommended.
  Always test changes in a development or quality system before applying to production.
  
  
  If you provide the exact context (transaction, country, tax code), I can help with more specific guidance.