Her other mainstream films include Khamoshi: The Musical (1996), for which she won the Screen Award for Best Supporting Actress, Bhoot (2003), Vivah (2006) and Half Girlfriend (2017).

[1][3] Biswas played the lead in Krishnan Kartha's Amshini (Hindi), it entered the Indian Panorama Section of Filmotsav 1988.

However, the general belief is that she debuted after Shekhar Kapur watched her perform in the NSD Repertory Company and offered her a role in Bandit Queen.

In 1996, she played the role of Flavy, a deaf and mute woman in Sanjay Leela Bhansali's Khamoshi: The Musical opposite Nana Patekar and won the Screen Award for Best Supporting Actress.

[citation needed] In 2014, Biswas was a jury member of the 45th International Film Festival of India, held from 20 to 30 November at Goa.