Chartered Accountant
5010 Points
Joined March 2020
You were required to reply to that message by 31st March 2021. These messages were sent by the department in the last week of March.
No you cannot revise your return because it is time barred now.
You can only file by applying for condonation
But the condonation request may not be accepted in this case.
Wait for further communication from department or for demand.