Hello,

According to the instructions given in the NATA Information Brochure you need to use the user ID and password which are provided to you. You may have to check your registered email ID or registered mobile number for login details. When you login your name will be displayed on top left hand corner and then you can proceed with the exam. It is not clear if you can use the user ID and password of your application. Please follow the instructions that are shared to you.