Notification in income tax return

nitinjain (accountant) (407 Points)

17 April 2022  
Dear sir I have filed a income tax return for a.y.2021-22 I have a rebate on arrear of salary where I have filed rebate from 10E wrongly in a.y. 2020-21
but all data relvent for a.y. 2021 -22
now i have received a demand .
what can i do.