Hi Aspirant!

You do not need to submit the 11th class marksheet , you are required to just enter the marks obtained in 11th class. If you do not have marks with you, you can contact the school authorities and ask for their help. They will surely guide you. You only need to submit the 10th class certificate and 12th class certificate. For more details, kindly visit here:

https://medicine.careers360.com/articles/how-fill-neet-application-form

Thankyou!