Regarding VF03 - pricing condition

Question

in transaction VF03 , small change needs to be done.
When necessary the invoices we make to Public Administration must show  an accurate amount. 
In some cases net amount plus taxes amount do not suit  the total invoice and
makes it  no legal so the customer returns the invoice to us.
invoice = net amount + taxes
there is a price condition ( KOMP-KSCHL) called ZESD which allows us to adjust the price to cents
while doing above calculation i don't want condition ZESD to be added in it.
can any one suggest where to make changes

Answer 1

Your situation isn't very clear, but you can't just write a few lines of code in the invoice program to stop a non-statistical condition from affecting the net value of an invoice.  You either need to write a requirement to stop the condition from proposing if it's condition record driven or you need to change your calculation routine to set the value to 0 per your requirement. 
Your functional counterpart who gave you the requirement that you pasted directly into your post should know this and be able to direct you accordingly...