How To Fix FOT_TDT100 - Docs have been posted with Tax Code &1 after Valid From &2

FOT_TDT100 - Overview

• Message type: E = Error

• Message class: FOT_TDT -

• Message number: 100

• Message text: Docs have been posted with Tax Code &1 after Valid From &2

What causes this issue?

Documents have been posted with Tax Code <(>&<)>1 after Valid From Date
of Tax Rate <(>&<)>2 you want to update. Updating the mentioned Tax
Rate, will mean that documents, which were posted after Valid From date
of new Tax Rate, will contain wrong Tax Items, as they were already
posted with the previous Tax Rate.

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?

This is a customizable message. You can request the service center to
put the message type for your User as Error "E", Warning "W" or Info
"I". The default message type is "Error".
If the message type is set to "Error", the system will not update the
Tax Rate until all already posted documents after new Rate's Valid From
date are reversed.
If the message type is set to "Warning" or "Info", the system will
update the Tax Rate. It is the responsibility of the user to reverse
already posted documents, which were posted after Valid From date of the
new Tax Rate, to avoid having documents posted with the old Tax Rate.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

FOT_TDT100 - Details

• The SAP error message FOT_TDT100 indicates that there is an issue with tax code validity in relation to the posting date of documents. Specifically, the error message states that documents have been posted with a tax code that is not valid for the specified date range.
  
  Cause:
  
  Tax Code Validity Period: Each tax code in SAP has a defined validity period (valid from and valid to dates). If a document is posted with a tax code that is not valid for the date of the transaction, this error will occur.
  Incorrect Posting Date: The posting date of the document may fall outside the valid date range of the tax code being used.
  
  Configuration Issues: There may be issues in the configuration of tax codes or the tax determination process in the system.
  
  
  Solution:
  
  
  Check Tax Code Validity:
  
  Go to the transaction code OBYZ (or use the appropriate transaction for your version) to check the validity of the