ITR 2020-21

I think no problem will happen but you might take an approval from CIT

Wrong..
HE CANNOT FILE THE RETURN AS REVISED RETURN.
AFTER LOGGING ONTO EFILING WEBSITE.
THERE ARE TWO OPTIONS ORIGINAL /REVISED/ CONDONATION U/SEC 119 (2)(B).
EVEN WHILE FILLLING UP THE DATA THE DETAILS ARE TO BE FURNISHED.
ORIGINAL OR REVISED RETURN.
THE XML FILE WILL NOT BE UPLOADED , THERE WILL BE A MISMATCH AND ERROR WILL BE DISPLAYED ON THE SCREEN.

Yes, correct
U cannot file revised return for the 1st time as u have to enter the original return acknowledgement number in case if you r filing revised return, other wise the form will show error
Recheck your acknowledgement, it will shows original only in case if you filed the ITR for the 1st time of relevant AY

Date of filing original return , with acknowledgement number . filing revised return under which section details has be furnished.

How can the revised be filed without filing original??

It is not possible

So querist be absolutely clear .
you hv to know the details how it works?

its was mistaken as i had already filled the original return but i was filed again the return for this it was showed as revised return. thank you all for clearing my doubts.

Dear all 

i am a salaried employee and i have got some allowances like house maintenance allowances / family maintenance allowances and prof. pursuit allowances .should this all are taken as fully taxable or not and under which head it will come??? kindly help me