How To Fix MH431 - Tax class is missing for material &1.

SAP Error Message - Details

• Message type: E = Error

• Message class: MH - Maintain Material Master Data (Retail)

• Message number: 431

• Message text: Tax class is missing for material &1.

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message MH431 - Tax class is missing for material &1. ?

  The SAP error message MH431, which states "Tax class is missing for material &1," typically occurs when a material master record does not have a tax classification assigned. This can prevent transactions involving the material from being processed correctly, especially in contexts where tax calculations are necessary, such as sales orders, purchase orders, or inventory management.
  Cause:
  
  Missing Tax Classification: The primary cause of this error is that the tax classification field in the material master record is not filled in. This field is essential for determining the applicable tax rates for the material.
  Incorrect Material Type: Some material types may not require tax classifications, but if they are being used in a context that does require it, this error can occur.
  Data Migration Issues: If materials were migrated from another system or if there were changes in the configuration, tax classifications might not have been set up correctly.
  
  Solution:
  
  
  Update Material Master:
  
  Go to the material master record using transaction code MM02 (Change Material).
  Enter the material number that is causing the error.
  Navigate to the relevant views (usually the Accounting or Sales views) and ensure that the tax classification field is filled in correctly.
  Save the changes.
  
  
  
  Check Material Type Configuration:
  
  Ensure that the material type is configured to require a tax classification. This can be checked in the configuration settings under SPRO > Logistics General > Material Master > Basic Settings > Define Material Types.
  
  
  
  Review Tax Configuration:
  
  Ensure that the tax codes and tax classifications are correctly set up in the system. This can be done in the configuration settings under SPRO > Financial Accounting > Tax on Sales/Purchases.
  
  
  
  Data Migration Review:
  
  If the materials were migrated from another system, review the migration process to ensure that all necessary fields, including tax classifications, were populated correctly.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  MM02: Change Material Master
  MM03: Display Material Master
  MM01: Create Material Master
  
  
  Tax Configuration: Familiarize yourself with the tax configuration settings in SAP, as they can vary by country and business requirements.
  User Authorizations: Ensure that the user has the necessary authorizations to change the material master data.
  
  By following these steps, you should be able to resolve the MH431 error and ensure that the material master records are correctly configured for tax purposes.