University of Calcutta don't offer the course of BSc in its campus. But it is offered by the affiliated colleges under it. For most of the colleges, the admission process have started. For that you have to visit the website of the college you wish to take admission and apply for it.

Some of the affiliated colleges are:

• Bangabasi College, Kolkata
• Bankim Sardar College, Kolkata
• Baruipur College, South 24-Parganas
• Basanti Devi College, Kolkata

For more colleges you may visit the link below:

https://www.careers360.com/university/university-of-calcutta-kolkata/affiliated-colleges?stream=8

I hope this answer helps. All the very best for your future endeavors!