How to file revised return

No chance to amend your ER-3 in ACES, If you have filed the return in ACES, .  In this case, you can give written communication to the respection range office with clear details. 

thnk u

In case of filing revised retrun with AC/DC the assesible value is to be modified or not?
Or
Keeping the assesible value same we just have to pay the duty at full rate?