Hello aspirant

To get a seat in IIT, you should qualify SC category cut off of JEE main and then Jee advanced.

Cut off changes every year, this year's cut off will be released after commencement and result of jee main session 2 and jee advanced 2020 .cut off depends on number of candidates appeared and qualified in exam, difficulty level of exam, previous year's cut off etc.

2019 cut off for jee main for SC category was 54.012 percentile do you should score minimum 50 or 75+ than this score.

For more information refer following link

https;//engineering.careers360.com/jee-main-college-predictor