Hello student you just need to clear the cut off Jee main to appear in Jee advance as admission is on the basis of marks/rank obtained in Jee advance.

You need to secure rank around 7,000(Genral) in jee advance to get admission in IIT Kharagpur.

Eligibility - Candidates must passed or appearing class 12 with physics chemistry and mathematics with minimum 75 percent marks aggregate from a recognized board.

For more updates refer to the link mentioned below - https://www.google.com/amp/s/engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-kharagpur/amp

Feel free to comment if you have any doubt

Good luck