Please go to https://nucleus.niituniversity.in/phd/ and create an account for yourself by providing the details specified in the registration form. And then proceed to fill in the Online Application Form.
Keep a note of the following before you start filling the application form:
Provide a valid email address as this will function as your Username when you login again. Further all future correspondence will be done on this email address.
Keep scanned copies of the following as you will be asked to upload them as you fill the application form:
Class X Mark Sheet
Class X Certificate
Class XII (or equivalent) Mark Sheet
Class XII (or equivalent) Certificate
Colour Photograph (scanned copy)
Final Year Graduation Mark Sheet
Final Year Post-Graduation Mark Sheet
Post-Graduation Degree Certificate
Work Experience Certificates (if you are working or have worked before)