payment of tax

https://onlineservices.tin.egov-nsdl.com/etaxnew/tdsnontds.jsp

Click on proceed in Challan No./ITNS 280 then fill details accordingly for making tax payment & download challan after all these work.

and of course as mentioned by Mr. Kapadia Pravin, you have to revise your return and put challan details on it then you can e-verify.

If you want to pay as offline mode then download through this link & deposit in bank as offline.

https://www.incometaxindia.gov.in/forms/107010000000345598.pdf

Please download pdf from given link, you can deposit cash as well as cheque in nearest branch of any bank.