If you want to apply for Institute Assistantship (i.e., if you do not possess External Funded Fellowships such as DST-INSPIRE, CSIR/UGC-JRF, etc.), please apply through the other portal during the period as advertised in the call for Admissions to the Ph.D. Program through IA/Part-Time/Sponsored Category Applicants.
Candidates with External Funded Fellowships such as DST-INSPIRE, CSIR/UGC-JRF, or any other National level fellowship can apply throughout the year through this portal.