International Institute of Information Technology Bangalore Answered Questions

If you are asking about International Institute of Information Technology (IIIT) Hyderabad, Than you have to fill the forms by using IIIT Hyderabad website only. Because IIIT Hyderabad is not the part of JEE Main counselling conducted by JOSSA. The admission portal of IIIT Hyderabad will be activated in the month of April 2020.

Admission to all courses is done on the basis of the entrance test followed by interview. IIITH Applications are filled online on https://www.iiit.ac.in. Admissions to UG Programmes are done through JEE Main UGEE and KVPY. IIITH conducts PGEE for admission to PG and Doctoral courses.

IIIT Hyderabad : International Institute of Information Technology, Hyderabad (IIITH) is an autonomous university, founded as a not-for-profit public private partnership (N-PPP) in 1998, and is the first IIIT in India under this model. The important facts about the IIIT H are given below.
1. NIRF Ranking : 82
2. Accredited at Grade A by National Assessment & Accreditation Council (NAAC) in Sept 2011
3. Ranked in the top 5 overall and #1 in campus placement, among all technology schools in the country, including the IITs, by Dataquest, India's leading IT publication, in 2011. CBIT Hyderabad : CHAITANYA BHARATHI INSTITUTE OF TECHNOLOGY, established in the Year 1979, esteemed as the Premier Engineering Institute in the States of Telangana and Andhra Pradesh, was promoted by a Group of Visionaries from varied Professions of Engineering, Medical, Legal and Management, with an Objective to facilitate the Best Engineering and Management Education to the Students. The important facts about the CBIT are given below.
1. Accredited by National Assessment and Accreditation Council (NAAC) with A Grade.
2. All UG Engineering and 5 PG Programs have been Accredited by National Board of Accreditation.
3. CBIT is permanently Affiliated to Osmania University, Hyderabad.
4. Autonomous Institution (UGC Approved) since 2013.
5. NIRF ranking : 100
So I will go with IIIT-Hyderabad.

You should go through the prospectus of the course provided by the college to know about details of selection, eligibility, fee, Entrances etc. See this link also:
https://www.shiksha.com/university/iiit-Bangalore-international-institute-of-information-technology-26396/admission.