hi harsha,
through mcc counselling you can apply for the 15 % quota seats , not the 85% seats. for the 85% seats you have to apply through KEA. http://kea.kar.nic.in/cet2018/UGNEET_2018_Brochure.pdf this is the official brochure of kea neet counselling. go through it , you will get to know if you can register for the second oround if you havent for the first .
hope it helps
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile