Hello,

Yes, as per the rules you have fill marks of both class 11 and 12 to further process your application form otherwise there will be an error everytime you click on the okay button.

But if you don't know write know you can fill later when there is an option of correction window.

You can visit your school and ask them to tell you about your marks from their database. And don't worry 11 and 12 marks doesn't affect your counselling process . You just need to score good in neet entrance exam.

Hope this helps!!