(#added default namespaces, abc namespace was in QueryResponse and had no name. Named and all underlying objects initialized with it) 

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:abc="http://kps.nvi.gov.tr/2011/01/01"

xmlns:s="http://www.w3.org/2003/05/soap-envelope" 
xmlns:i="http://www.w3.org/2001/XMLSchema-instance"
xmlns:a="http://www.w3.org/2005/08/addressing" 
xmlns:u="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"
xmlns:b="http://schemas.datacontract.org/2004/07/Common.Types.Containers.Services">
    <xsl:template match="/">
     <Envelope><Header/><Body>
        <xsl:apply-templates select="s:Envelope/s:Body/abc:InquireResponse/abc:InquireResult/abc:QuerySonucu/abc:CompositeFileInformation/abc:TRCitizenPersonBoxes/*"/>
         </Body></Envelope>
    </xsl:template>
    
    <xsl:template match="@*|node()">
        <xsl:copy>
            <xsl:apply-templates select="@*|node()"/>
        </xsl:copy>
    </xsl:template>
    
</xsl:stylesheet>
XML