The youth, identified as Anand Burman, was dragged outside polling booth number 85 in Pathantuli area of Sitalkuchi while voting was underway and shot dead.
The TMC had announced it will release its manifesto on March 9 but later decided to postpone it to March 11 due to the Kolkata fire incident which claimed nine lives.
The chief minister is at present undergoing treatment at the SSKM Hospital in Kolkata with injury to her left leg, waist, shoulder and neck, according to doctors.
Accompanied by party president Subrata Bakshi, Banerjee filed her papers at the Haldia sub-divisional office here, after taking part in a 2-km roadshow.