Diagnosis
You have changed a deferred tax code without reverse charge to adeferred tax code with reverse charge or vice versa. Postings alreadyexist in the down payment chain for the previous tax code.

Procedure
Choose another tax code or reverse the already existing partialinvoices.

Procedure for System Administration
You can only change a deferred tax code without reverse charge to adeferred tax code with reverse charge if the cumulative invoice amountequals zero.