Hello Aspirant, NEET  qualified candidates have to through their state authorities for taking the admission. Applications are available in online mode you can register there and fill the form and then the payment process and after that submit it online. 

For further details I am providing you a link. 

https://www.google.com/amp/s/medicine.careers360.com/articles/admission-in-private-medical-colleges-through-neet/amp

I hope this will help you. 

Hello aspirant,
If you want to Join private Medical colleges & deemed universities of India for MBBS admission, you have to pass national entrance exams [NEET UG].
Getting MBBS admission In India is also possible through management quota. But the only drawback is you need to pay more to get the MBBS admissions.
For admission in MBBS, you must score more than 50% in 12th board examinations In Physics, Chemistry, and Biology altogether.

It is compulsory to score more than cut-off marks in Neet Entrance Exams.
For general Category students: Neet score should more than 50 % marks than the declared cut-off.
For OBC Category students: Neet score should be more than 45 % than the declared cut-off marks.
For SC/ST Category students: Neet score should be more than 40 % than the declared cut-off marks.

If you have scored more than cut-off marks, then you can apply for private Medical colleges offering MBBS admission through valid Neet score.
All the best.