i have to add the the spelling of the total amount in po. that po which i copied from the medruck and i change the name of that script in NACE tc and given my script name i m using the same standard me21n program.i got the function module for the spell but i don't know in which program of me21n i have to use that func. mod. and how i passed the total amount value to that fm. is there any user exit is available for this. plz help me..