How To Fix M8129 - Account & & for deductions/cash discounts cannot be tax relevant

SAP Error Message - Details

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 129

• Message text: Account & & for deductions/cash discounts cannot be tax relevant

What causes this issue?

The system is trying to automatically post cash discount deductions or
unauthorized deductions to account &V1&. In company code &V2&, no tax
adjustment is defined for deductions of this kind (Customizing for
Financial Accounting is configured so that the net amount is the basis
for the cash discount). In this case, the account to which the posting
is made must not be tax-relevant.

System Response

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

How to fix this error?

Either your system administrator corrects the configuration.

<DS:TRAN.OB70>Proceed</>

or you correct the master data for account &V1&.

<DS:TRAN.FS02>Proceed</>

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M8129 - Account & & for deductions/cash discounts cannot be tax relevant ?

  The SAP error message M8129 indicates that there is an issue with the configuration of account determination for deductions or cash discounts in relation to tax relevance. This error typically arises when the system is unable to determine the appropriate accounts for posting deductions or cash discounts that are supposed to be tax-relevant.
  Cause:
  
  Account Configuration: The accounts configured for deductions or cash discounts may not be set up to be tax-relevant. This can happen if the account type or the account settings do not allow for tax calculations.
  Master Data Issues: The vendor or customer master data may not have the correct tax classification or settings that align with the account determination.
  Tax Code Issues: The tax codes used in the transaction may not be compatible with the accounts being used for deductions or cash discounts.
  Transaction Type: The type of transaction being processed may not support tax relevance for deductions or cash discounts.
  
  Solution:
  
  
  Check Account Configuration:
  
  Go to the configuration settings for account determination in the SAP system (Transaction code: OBYC).
  Ensure that the accounts for cash discounts and deductions are correctly configured and marked as tax-relevant.
  
  
  
  Review Master Data:
  
  Check the vendor or customer master records to ensure that the tax classification is set correctly.
  Ensure that the relevant tax codes are assigned to the master data.
  
  
  
  Verify Tax Codes:
  
  Review the tax codes being used in the transaction to ensure they are set up correctly and are compatible with the accounts for deductions/cash discounts.
  
  
  
  Adjust Transaction Type:
  
  If the transaction type does not support tax relevance, consider using a different transaction type that allows for tax calculations.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on configuring tax relevance for deductions and cash discounts.
  
  
  
  Testing:
  
  After making changes, perform a test transaction to ensure that the error no longer occurs and that the deductions/cash discounts are processed correctly.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error message or provide additional guidance on configuration.
  Transaction Codes: Familiarize yourself with transaction codes related to account determination (e.g., OBYC, OBC4) and master data maintenance (e.g., XK02 for vendor, XD02 for customer).
  User Forums: Consider visiting SAP community forums or user groups for additional insights and solutions from other users who may have encountered the same issue.
  
  By following these steps, you should be able to resolve the M8129 error and ensure that deductions and cash discounts are processed correctly in relation to tax relevance.