Hello Madhumitha

You can't change or edit application right now. If you want change the application you have do before only. They will give a time for error rectification. But now it cannot possible. You have to edit it at the time of applying only now there is no possible. Try it once if there then go for it. With my knowledge now it not possible after releasing the results, rank card etc. 

Hope this will be helpful

Good Luck.