You can log onto https://ntaneet.nic.in/Ntaneet/Welcome.aspx for admission process or log onto state websites like:
Central counselling for 15% AIQ
http://www.mcc.nic.in/
Haryana state 85% quota
http://www.uhsr.ac.in/
Himachal Pradesh
http://www.hpuniv.nic.in/
Madhya Pradesh
http://www.medicaleducation.mp.gov.in/
Manipur
http://www.manipurhealthdirectorate.in/
Odisha
http://www.dmetodisha.gov.in/
Rajasthan
www.medicaleducation.rajasthan.gov.in
Chandigarh
www.gmch.gov.in
Delhi
www.fmsc.ac.in
Uttar Pradesh
www.updgme.in
Bihar
www.bceceb.com
Uttarakhand
www.hnbumu.ac.in