Hello Aspirant,

According to your score 20 percentile in JEE mains , your rank will be under 1000000 . With this rank it is impossible to get any of the NITs or IIITs or CFTIs. But  you can try for private colleges.

Use the below link to get list of colleges that you can get based on your rank :

https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp

check out the previous year's cutoff :

https://engineering.careers360.com/articles/jee-main-cutoff

You can also check out marks vs rank vs percentile from the below link:

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

Hope this information helps you.

best wishes!