Aksa, if you are repeating your 12th in 2020, you should mention that you are appearing for 12th in 2020 and select code 01. Then you needn't mention your 12th marks because technically you are repeating your 12th. If it was improvement exams, it would have been different. But because you are repeating your 12th, please select the option that you will complete your 12th in 2020. Then the application will not ask you for your 12th marks. And please also remember to change your Qualification code to 01. To help you during admission and counselling, we have https://www.careers360.com/mbbs-companion.