As a part of invoice in body the following xml node has been added in the request, have done this so that tax is not applied or calculated for particular order amount

<ns:IS_EXEMPT>true</ns:IS_EXEMPT>

<ns:EXEMPT_REASON>99</ns:EXEMPT_REASON>

In the response I could see , the the tax calculated and following

<MESSAGE> <LOCATION>TaxFinder.determineApplicableTaxes</LOCATION> <CATEGORY>CALCULATION</CATEGORY> <CODE>EXEMPTION_CERTIFICATE_PROCESSING_DISABLED</CODE> <MESSAGE_TEXT>Exemption Certificate processing has been disabled.</MESSAGE_TEXT> <SEVERITY>0</SEVERITY> </MESSAGE>

Is there anything else that need to be done to exempt tax for a order beside adding the isExempt and exemptReason node in the SOAP request

Regards

Roshan