Dear Student,
You're definitely not clear with your question as you haven't specifically mentioned the college you are asking for as the date of admissions varies from college to college. I might guess that you're asking about the University of Delhi, so if you're asking about admissions in b.com. in DU the registrations have already started from 15th May and you can only register online this year but do remember to apply before 7th of June as it is the last date for online registrations. Following is the link to the registrations page:-

https://ug.du.ac.in/app2k18/Account/Register

Hope this might help you.