Dear Deepak, NTA has opened the correction window for JEE Mains. You can make changes to the Academic details of your application form. So you should be able to correct the College name. The last date to make corrections is October 20th and you may have to hurry. Visit the official website at: jeemain.nta.nic.in (https://jeemain.nta.nic.in/webinfo/public/home.aspx) , Click on Application correction and login with your Credentials. Make the necessary changes and save the changes and submit the application form. Take a Print out of the confirmation mail for future reference.