You haven't mentioned the course you are enquiring about. Neverthless, if it is for Undergraduate courses like B.E/B.Tech, the admission is through TNEA Counselling. At this point in time, Anna University has not released the online notification for TNEA 2020. It might be released tentatively during the month of June, probably after the lockdown. For complete information on TNEA counselling please read our article: https://engineering.careers360.com/articles/tnea-2020-application-form . But if it is for some other course, please do let us know and we shall help you with relevant information.