Thank you Ludo, It's good idea, but i have one doubt regarding accounts. If i do like this the account what i selected for discount in line takes the amount in -ve. In my guess it's stored in db also -ve form. Suppose take an example, I have discount account. I want to select this account, while i am giving discount. i have a sales transaction with rs -5 as discount. When i see the balance of "discount" account, It is showing rs -5 balance. Am i face any problem in my accounting system because of this? Please help me.