Dear exper i have added one field at EI info line, and stor it as number now i want to change item rate field of that stock item. for eg. item A , Qty 50, rate 10, value 500 if myfield have value as 6 then rate should be 6 ( or whatever formula i want like 6 + 5 ) Actually i am doing it for- one retailer have rate of items with inclusive of vat and want to sepreate it and net amt will store in $rate automatically. If any other way to do it pl share I know we can set inclusive vat system tally without tdl but party have set vat rate to item master and want sipmle method it. regards mithari