How To Fix 6A666 - Due date used as a basis for tax calculation

6A666 - Overview

• Message type: E = Error

• Message class: 6A - Real estate messages rent adjustment

• Message number: 666

• Message text: Due date used as a basis for tax calculation

What causes this issue?

The due date for the item was used as a base for the tax calculation
per cash flow item. The amount indicated may therefore deviate from the
amount already posted or to be posted since the posting date or
document date was used as a base for the debit position.

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

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

6A666 - Details

• The SAP error message "6A666: Due date used as a basis for tax calculation" typically occurs in the context of tax calculations in SAP, particularly when dealing with invoices or payment processing. This error indicates that the system is trying to use a due date for tax calculation, which is not allowed or not configured correctly.
  
  Cause:
  
  Incorrect Configuration: The tax calculation settings in the system may not be configured to allow the use of due dates for tax calculations.
  Document Type Settings: The document type being used may not be set up correctly to handle tax calculations based on due dates.
  Tax Code Issues: The tax code associated with the transaction may not be configured properly, leading to issues in tax calculation.
  Data Entry Errors: There may be incorrect or missing data in the transaction that is causing the system to default to using the due date.
  
  
  Solution:
  
  
  Check Configuration:
  
  Review the tax calculation settings in the