Diagnosis
You entered the necessary data for the line item for input taxtreatment. However, based on the Customizing settings for the accountassignment object of this line item, there is no input tax treatment forthis line item.

System Response
The entered data is ignored and is not updated.

Procedure
Check your Customizing settings for inputtax distribution.
Possibly you also did not enter an account assignment object for theline item. Change your account assignment entries, if necessary.