Here are the important dates:

Regular deadline: June 10, 2013
Late deadline: June 16, 2013
Extended deadline: July 10, 2013
DVD screeners must be postmarked no later than these respective dates in order to be considered for the 2013 Boston Film Festival. Filmmaker notifications will go out in August, 2013.

Film Categories
Feature Length (minimum 60 minutes runtime)
Documentary (any length runtime)
Short Subject (maximum 30 minutes runtime)
Animated (based on type — see runtimes above)

To summit your film please visit website