http://help.sap.com/saphelp_erp60_sp/helpdata/en/3a/6920bd76002b6de0000800091c1b0e/content.htm

  

Classic withholding tax compare to extended withholding tax

http://help.sap.com/saphelp_erp60_sp/helpdata/en/3a/6920bd76002b6de0000800091c1b0e/frameset.htm