Message type: E = Error
Message class:  TXRG_POSTING - Tax Register Posting Message Class 
Message number: 402
Message text: Tax item is not found
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.
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.
The SAP error message TXRG_POSTING402: Tax item is not found typically occurs during the posting of financial documents when the system cannot find the relevant tax item for the specified tax code. This can happen in various scenarios, such as during invoice postings, payment processing, or other financial transactions that involve tax calculations. Causes: Missing Tax Code Configuration: The tax code used in the transaction may not be properly configured in the system. Tax Item Not Defined: The specific tax item associated with the tax code may not be defined in the system. Incorrect Tax Jurisdiction: The tax jurisdiction may not be set up correctly, leading to the inability to find the tax item. Master Data Issues: The vendor or customer master data may not have the correct tax information. Changes in Tax Regulations: Recent changes in tax regulations may not have been updated in the SAP system. Solutions: Check Tax Code Configuration: Go to the transaction code OBYZ
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
TXRG_POSTING401 Document number is not generated
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
TXRG_POSTING270 Tax amt in trans curcy is 0 and not manually updated and tx rate is non 0
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
TXRG_POSTING601 VAT project has failed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
TXRG_POSTING602 VAT check has failed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.