Paying tax liability

Before filing your returns you should give the Tax payment details in the coloumn Self assessment tax . So u have done a wrong. But no problem u have to pay u the pay the tax and give the details in the ITR again and file the revised return. to avoid demand notice

Go to incometax website and click on pay taxes. Select self-assessment tax and pay online using your bank. Take a print out of the challan after the payment. Use the challan details to fill in the ITR. You will need to revise your ITR mentioning the self-assessment tax paid and file your ITR having nil tax liability. 

You need to pay self assesment tax either through internet banking or pay in authorised bank.Your Ca will guide you.

THIS RETURN IS DEFECTIVE SO PLEASE PAY THE TAXES FIRST BEFORE FILLING THE INCOME TAX RETURN EITHER ONLINE OR MAKEING CHALLAN 280 TO BANK