Dear Bhargavi, you haven't mentioned the entrance examination for which you have entered the gender wrong. Few application forms have Correction window during which you can correct few details. Again this is based on the exam that you are applying for. Few entrance exams do not have correction windows for their application forms. In such case, if you haven't made the payment yet, you can edit the details. But if you have made the payment, you will have to fill in a new application form and make another payment.