we are trader. we purchased material from manufacturer and supplied to our Customer as E-1 transaction on 2% CST against C-form. in our contract it is mentioned that ED on that material is also reimbursable. so we claim that also. but Our client has issued us C-form with basic material value + ED. Is there any circular which shows that C-form should be issued on basic value only. means since ED is reimbursable so C-form is not applicable for that value.