As you want to take admission in Indian Institute of Space Science and Technology (IIST) B.tech program and asking for form availability so here I am telling for the same :

Key dates
Online registration of application opens on 08 Jun 2016
Online registration of application closes on 26 Jun 2016
Last date for remitting registration fee in Bank 27 Jun 2016
For NRI Candidates Only 27 Jun 2016
Publication of IIST Admission Rank list and Counselling details 29 Jun 2016

Application Fee
Male candidates in GEN and OBC – Rs. 600/-
Female candidates in GEN and OBC – Rs. 300/-
All SC, ST, PD candidates – Rs.300/-

Process to fill online form
Visit the online application portal

click the link for undergraduate admission-2016 and fill in all the details in the online application form as per the instructions given there.

After completing online registration, Download and Print the Challan ( or NRIPayment Form for NRI candidates) and remit the Registration Fee.

Payment can be made at the Bank only on the next working day after the date of registration.

Enter the Bank Transaction Details by logging into the online application portal using your Registration Number and Password.

Upload the scanned image in PDF/JPEG format of the Institute copy of the Challan countersigned and stamped (seal) by the Bank.

Address
Undergraduate :
Chairperson (Admissions)
Dr Raveendranath P
Telephone: +91-471-2568477 / 8478 / 8555
Fax: +91-471-2568556
Email: ugadmission2016@iist.ac.in