got 95.6 percentile in JEE mains 2020 but got less than 75 percent in board. which college and branch can l get in for btech?

You can apply for good private universities or institutes who are taking their own entrance exam and having their own admission criteria like:

SHIVNADAR UNIVERSITY

NORTHCAP UNIVERSITY

MANIPAL INSTITUTE OF TECHNOLOGY

BENNETT UNIVERSITY

IILM UNIVERSITY,GURUGRAM

LOVELY PROFESSIONAL UNIVERSITY

BML MUNJAL UNIVERSITY

AMITY UNIVERSITY

SRM UNIVERSITY etc

You can also try for state level counselling for engineering admission.

IILM UNIVERSITY,GURUGRAM is offering B.tech in computer Science and Information Technology with contemporary computing areas like:

Cloud Computing

Artificial Intelligence (AI)

Big data

Internet of Things (IoT)

Machine Learning

Deep Learning

Image processing

Block Chain

Hello,
Your percentile in JEE mains paper is quite good but as you have not secured minimum of 75% in your boards, you won't be eligible for admission into NITs, IIITs and GFTIs. This criteria is applicable for only general category students. For ST, SC and OBC and PwD category the minimum marks in 12 boards is 65% .
You can go for some top private engineering colleges in India which accept the JEE mains score. Also based on your Rank in JEE mains, you will get a good amount of fees concession.
Here's a list of top private engineering colleges in India which accept JEE mains score https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/colleges/list-of-private-engineering-colleges-in-india-accepting-jee-main&ved=2ahUKEwj20IDA28DqAhW_wzgGHeQZD6EQFjADegQIAxAC&usg=AOvVaw24m3lhnJnkiYxFQHt_5cXG

Hope it helps

There is no percentage barrier in Jee Main. The 75% criteria is only for getting admission in NITs, IIITs, CFTIs and IITs. As you haven't got 75% marks in Board or not in top 20 percentile of your board, you'll not be eligible for admission in these institutes. You can use our Jee Main college predictor tool to know about your admission possibilities - http://engineering.careers360.com/jee-main-college-predictor
But you have a good percentile score in Jee Main based on which you can get top engineering colleges. 95.6 percentile in Jee Main means your expected rank would be around 38,236. If the number of candidates in second phase increases your rank would also increase. Based on your score and last year's data, you can get- Sant Longowal Institute of Engineering and Technology, Institute of Technology - Guru Ghasidas Vishwavidyalaya, Tezpur University etc.