is anyone get admission in nit or iiit for 56 percentile in any year in st category

As you  said you are from st category, you are qualified for jee advanced.

And to get colleges through CSAB counselling, you can attend CSAB counselling special rounds and check which IIIT's or NIT's are accepting this score.

You have only 56 percentile, so getting branches like computer, it and electronics are quite though.

And yes, there are many other colleges you can also apply to continue your btech course.

You can get better information on this website - https://engineering.careers360.com/articles/csab

Hello,

Your score is not good enough to get admission in any college with JEE mains rank (NITs or IIITs). The cutoff is very high for government colleges and you don't have that rank.

You need minimum 70 percentile for admission in NITs or IIITs.

But you can try for State Government college.

You can check your predicted college:

JEE Main College Predictor 2021 : Predict Colleges based on your JEE Main Rank

JEE Main College Predictor – Know your College Admission Chances Based on your Rank/Percentile, Home State, Caste, Gender, Exam Result & Get ...

Hope this helps

Thank you