Respected sir,

Here is the eligibility criteria

Examination SchemeWho are eligibleEligibility Duration

Section A (NON-Diploma)Technician Members of IEI onlySix years based on the date of enrolment as Technician member

Section A (Diploma)Senior Technician Members of IEI onlySix years based on the date of enrolment as Senior Technician member

Section B

Technician and Senior Technician Members of IEI who have completed Section A in their respective Scheme or exempted from Section A.Six years after completion of Section A

Corporate Members of IEI (FIE / MIE / AMIE) in any discipline provided he/she has not completed section B examination of IEI or Graduate degree in Engineering in the same discipline earlier.Six years from the Registration of Section B Examination.

I am sorry the other person who answered your query did not get it properly I know you're not talking about iit and Sudhir talking about the Calcutta Institute that is a good Institute as well and it has good placement and infrastructure records. But for this also you do have to give your JEE Mains examination and when you clear it you will be given your seat by JOSSA on clearing the required rank as mentioned below.
Below given is the course wise cutoffs for different year

B.Tech Information Technology

42410

B.Tech Computer Science and Engineering

29463

B.Tech Electrical Engineering

47269

B.Tech Mechanical Engineering

43366

B.Tech Electrical and Electronics Engineering

47224

B.Tech Electronics and Communication Engineering

39955

Hello rakesh.
You just have to complete your 12th grade and crack JEE mains first. Upon doing so, you'll be eligible to write JEE advanced and if the rank is good enough, you'll make it to the IITs