Claims and Debit Claims Tax Inclusive

Scenario: Customer is in EU country where VAT is applicable.

Customer deducted EUR 100 -- expectation is 83.33 is original deduction and 16.67 is VAT @ 20% .

When the claim is created it is showing up as DED -- we matched accruals and settled as Credit Memo --> now the credit memo is coming as

Line amount -- 100

VAT @ 20% -- 20

In Trade Management --> System Parameters there is a check box "Claims and Debit Claims Tax Inclusive" --we checked this box and we did not find any impact of VAT treatment.

Can you guys suggest any way out for this scenario.

Thanks in advance.

Srini Grandhi