The 30-year-old actress took to Twitter and said she was very thrilled to hear the news.
"Chattisgarh tax free! Thank you Chief minister #ramansingh sir! Thank you for making #Neerja tax free! Very thrilled!," Sonam wrote.
The Ram Madhvani helmed biopic is based on the life of slained air hostess Neerja Bhanot, who saved 360 lives on a Pan Am flight that was hijacked in Karachi in 1986.
Bhanot became the youngest and first woman recipient of the prestigious Ashok Chakra Award, posthumously.
"Believe #Chattisgarh has just announced #NeerjaTaxFree ...Thank You Hon CM Raman Singh ji," Kasbekar posted on Twitter.
Besides Chhattisgarh, "Neerja" has also been made tax free in Maharashtra, Gujarat, Uttar Pradesh and Delhi.