Hello ,

Yes ,You can give your class 12 examination next year if you were unable to give it this year due to some reason but you will have to repeat your class 12 from scratch and you will be studying with your juniors now.

To do this you will have to contact your school administration and sort out about doing class 12 again , you can also take transfer certificate and change your school .

On the bright side you will have one extra year for preparation and you can also prepare for entrance exams .

Hope this helps.