Hello dear, 

For B. Tech admissions,Jamia millia takes admission on the basis of jee mains results, you are shortlisted for the admission on the basis of rank in jee mains .For this you have to fill online form which has been released in 25 Feb and the last to register is 31 march.You will shortlisted by the concerned authority and then you will be counseling. 

For more details you can check the link provided -

https://engineering.careers360.com/articles/jamia-millia-islamia-jmi-btech-admissions