Hi Samridhi. Now there will be no chance to make amendment in your application form. And if you had not filled your category as EWS category at that time, you will have no possible way to change it now. It's good that you have made your category certificate and now you can use it in other exams. But this certificate is valid only for 1 year. You will have to make other certificate next year. So, make it early next year.