I got 71% in 12th board 2018 ie this year. So will the improvement exam would be held this year in July 2018 or next year March 2019?
The improvement exam will be held in july next year not this year. You want to go for improvement? Was there any subject in which you did not score well?

Can u explain me further please.
Next year exam will be fill by October 2018.
Thanks,
Azim