Is it mandatory to file monthly returns if a trader does not choose to pay tax under the composition system?

Traders who do not choose to pay tax under the composition scheme must file monthly returns. For outward supplies made by trader in the month being returned, Form GSTR-1 must be completed by the 10th day of the following month. The auto-populated parts of Form GSTR-2, Form GSTR-3 can be used to verify the information and then submitted by the 15th or 20th of each month.