ITR processed incorrectly.

Profit on sale of land was ₹2lakh which was shown in profit and loss account in ITR 3 and then it was deducted from total profit to arrive at business profit and this 2lakh was deducted through table "considered separately under other heads of income". which is correct treatment as per ITR form. LTCG after indexation was ₹1.25lakh. Department has not deducted ₹2lakh under the above mentioned table but they considered only ₹1.25 lakh due to which my business profit has been increased according to intimation and demand has been raised. So now what should I do ?