Shashikala, 

NIT WARANGANAL takes admission through procedure of joint counseling along with IIT OTHER NITS /IIITS AND GFTIS. 

The counseling is done by Josaa/Csab.

It starts after the result of JEE advanced. You have to fill application form at josaa 2019 official website. Then you have to fill the choice of colleges and branches you want. 

Make sure you add NIT WARANGAL in choice filling. If you good rank then  definitely you will get it.