Hi,

For Delhi state counselling eligibility, you must have done class 12th from Delhi state only. If your school was in Delhi, then you are eligible for Delhi state counselling. The fact that you took a drop year and went to Kota has no affect on your eligibility criteria.

Here is a link that you can refer to get more details about JAC counselling reservation: https://engineering.careers360.com/articles/jac-delhi-reservation-criteria

I hope this helped you.