Mistake in filling statement of income

while filling return of a society we file society income ( except interest income ) as business income and we show the interest received by apex bank as other sources

and claim whole income ( business and other income ) under 80 p


now department issue 143 (1) demand notice they allow deduction under 80p to the extent business income we declare.


my question whether I file revised return by showing whole income as business income and deduct whole income under 80p
or
rectification is necessary? if yes kindly provide link to do the same.

thank you...