Hi Tamil
The check tables for Product Tax data in ERP are TSTL and TSKM. SPRO Path for Table TSTL: Sales and DistributionàBasic FunctionsàTaxesàDefine Tax Determination Rules
Check them in ERP and then you need to define them in:
Cross-Application Components > SAP Product > Tax Types and Tax Groups > Define Tax Types and Tax Groups
Then you need to update table SRMV_TAX_MAP with SM30 in order to add the taxes you have defined previously, with the right sequence.
Refer Notes and links below :
OSS note 883328 - Brazilian Tax details in Product Master and Shopping cart
607539 - BAPI_PO_CREATE1/-CHANGE : tax code not NAVS condition type.
http://scn.sap.com/thread/3359400
http://wiki.scn.sap.com/wiki/display/CRM/TAX+Classifications+and+Tax+Mapping+between+ECC+and+CRM.
Regards
Vinita