Hi Sonu,

The last date for class 11th and 12th registration in CBSE is not announced yet as schools are not open from March. By the way, the registration dates of schools will vary from school to school. You should go to the school's website or to the school to enquire about the same. The new admissions are also not able to condemn smoothly, it's very far away to register with the board.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!