Non-cooperation movement
Mukherjee became political active in the 1920s, taking part in the Civil Disobedience Movement and jute mill workers union struggles in Bengal. In 1921 Mukherjee went to Etawah with his friend Radharaman Mitra and participated in Non-cooperation movement. They were arrested and imprisoned. After being released from jail. he returned to Bengal following the order of Motilal Nehru and started working for Congress Swaraj Party.