Dear Karthikeyan, once you complete the Basic Registration process, the code generation will begin. In this, the details that you have submitted in the Basic Registration form are accepted and a code is generated for initiating the final registration process. You can generate this code from January 29th to February 17th. Ideally, you will receive a notification whether your application has been accepted or not. Only those candidates whose application has been accepted can generate this code for the final registration process. This is to make a payment towards application fees and exam city selection. Only when you generate this code, you will be able to proceed with the next step of AIIMS MBBS application form.