My friend has filed an IT return for FY 11-12 on 19.06.12 and validated the same through EVC. However there was tax liability of Rs. 11047/- which he paid after uploading and filing return on December-12, he had received a message from the IT department towards payment of the same. Please help me as to how he can intimate IT that he has paid the tax liability, is he supposed to file rectification for this. Please please help me regarding this.