How To Fix M8052 - Tax code can no longer be changed

M8052 - Overview

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 052

• Message text: Tax code can no longer be changed

What causes this issue?

If you have entered the tax code <LB>**</>, it cannot be changed, since
this code allows different tax rates in individual items.

System Response

When you acknowledge the message, the system will overwrite your input
in the field <LS>Tax code</> and replace it with <LB>**</>.

Error message extract from SAP system. Copyright SAP SE.

M8052 - Details

• The SAP error message M8052, which states "Tax code can no longer be changed," typically occurs when you attempt to change the tax code for a material document or a transaction that has already been posted. This error is related to the way SAP handles tax codes in financial transactions, particularly in the context of materials management and accounting.
  
  Cause:
  
  Document Status: The document you are trying to change has already been posted, and SAP does not allow changes to certain fields, including tax codes, after posting.
  Tax Code Locking: The tax code may be locked due to the document being part of a closed accounting period or due to other restrictions in the system.
  Configuration Settings: The system may be configured to prevent changes to tax codes in certain scenarios, such as when the document is linked to a specific accounting treatment.
  
  
  Solution:
  
  Check Document Status: Verify if the document is already posted. If it