Exit help

Hello frnds,

I hav a problem in user exit as i m new so facing problem can anyone hlp me.i giving detailed information about my requirement to u all.

user exit IT001

we have to create a user exit that checks that the fy of the reversal document is the same as the fiscal year of the reversed document

In on line transaction FB08 we take value filed RF05A-GJAHS. With this value check if equal last five digit of value in filed BSIS-BUDAT.

If equal TRUE, else FALSE

this was given

it is one user exit

plz tell me hw to do

loooking for ur replies.

thanking u

regards,

satya