WE ARE IMPORTER OF HEAVY MELTING MILD STEEL SCRAP.WE HAVE BEEN IMPORTING HMS @350 $ PER TON(AS PER SUPPLIERS INVOICE)BUT THE CUSTOMS DUTY IS CALCULATED ON 490$ NOW WE NEED TO DOWN LOAD 8FA FROM SALES TAX SITE AND WANT TO SPECIFY THE VALUE ON 8FA.THEN HOW CAN WE CALCULATE THE VALUE.IF U ADVICE ME TO CALCULATE ON THE BASIS OF CUSTOMS VALUE(ON BILL OF ENTRY)THEN HOW CAN I TALLY THE SUPPLIERS LEDGER WITH OUR LEDGER.NOW SALES TAX AUTHORITY(CHECK POST)FORCING US TO CALCULATE ON THE BASIS OF BILL OF ENTRY VALUE ie.490+DUTY+FREIGHT. CAN ANYBODY GIVE THE CORRECT GUIDELINES.