Dear Student ,
Non Cooperation Movement ended in the year 1922 due to the Chaura Chauri incident. The Chaura Chauri incident took place on 4th febuary 1922 , when a large group of protesters murdered some Police officers. The movement was supposed to be a non violent one, focussing on Indians to withdraw their titles or resign from government jobs, boycott of foreign goods and refusal from paying taxes.Due to the violent outrage, Gandhiji himself called off the movement.
Regards.