How To Fix WS134 - Different tax is only permitted with "Post tax"

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 134

• Message text: Different tax is only permitted with "Post tax"

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WS134 - Different tax is only permitted with "Post tax" ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WS134 Different tax is only permitted with "Post tax"
  
  Cause:
  This error occurs when you try to enter or post a tax code that differs from the expected tax code in a scenario where the tax procedure or configuration does not allow different tax codes unless the "Post tax" indicator is set.
  In other words, the system expects the tax to be calculated or posted in a certain way, and if you try to use a tax code that is different from the one configured or expected, the system throws this error unless the "Post tax" option is enabled.
  This typically happens in tax determination or tax posting scenarios where the tax procedure or condition types are configured to restrict tax code variations unless the "Post tax" indicator is active.
  
  Explanation:
  
  "Different tax" means you are trying to post a tax code that is different from the one expected or default for the transaction.
  "Post tax" is a setting or indicator that allows posting of tax amounts that differ from the calculated tax, i.e., manual or adjusted tax postings.
  If the system is configured to not allow different tax codes unless "Post tax" is enabled, and you try to post a different tax code without this setting, the error WS134 is triggered.
  
  
  Solution:
  
  
  Check the Tax Procedure and Condition Types:
  
  Review the tax procedure assigned to the country and transaction.
  Check the condition types related to tax and see if the "Post tax" indicator is set.
  
  
  
  Enable "Post tax" Indicator:
  
  If your business process requires posting different tax codes, enable the "Post tax" indicator in the tax condition type or tax procedure.
  This is done in the IMG under:
  
  Financial Accounting (New) > Financial Accounting Global Settings (New) > Tax on Sales/Purchases > Basic Settings > Check Calculation Procedure
  Or under condition type configuration in SPRO > Sales and Distribution > Basic Functions > Tax on Sales/Purchases > Check Calculation Procedure
  
  
  
  
  
  Use Consistent Tax Codes:
  
  If "Post tax" is not to be enabled, ensure that the tax codes used in the transaction are consistent with the expected tax codes configured in the system.
  
  
  
  Check Transaction Data:
  
  Verify the tax codes entered in the transaction.
  Make sure they align with the tax codes allowed for the transaction type and country.
  
  
  
  Consult with Tax/Finance Team:
  
  Sometimes, the business requirement is to post different tax codes manually.
  In such cases, the tax configuration must be adjusted accordingly.
  
  
  
  
  Related Information:
  
  This error is common in Sales and Distribution (SD) and Financial Accounting (FI) modules where tax codes and tax procedures are tightly controlled.
  The "Post tax" indicator allows manual adjustment or posting of tax amounts different from the system-calculated tax.
  SAP Note or documentation related to tax configuration might provide additional insights.
  Always test changes in a development or quality system before transporting to production.
  
  
  If you provide the transaction code or module where this error occurs, I can give more specific guidance.