Hello aspirant

If you have completed classxi from same school , you must be having your class xi roll number. Every school provides roll numbers to the students .

Talking about your class xi marks , though it is not board exam, you must go to your school and  ask your school teachers . They will tell you which marks you will have to enter in neet application form fir class xi .

Generally there are final exams in class xi in every school , you must enter those marks.

Hope it will help you .