Income Tax Department — Incorrect Interest Applied Demand Raised

Address:

Gautam Buddh Nagar, Uttar Pradesh

My PAN No is AXMPG8360L I submitted ITR for FY[protected] in July 2013 and paid all the taxes as well. Tax paid in July 2013 was 7, 710 Rupees. But, due to some miscalculation of 13 Rupees, I had to file ITR again in March 2014. Now, I have received a demand of rupees 633. Which includes in interest of 620 Rupees. They have applied interest for July 2013 to March 2014 on 7, 710 rupees which I paid in July 2013. I have raised rectification request three times and discussed the issue on phone and sent the email as a proof. But, this demand is not revised yet. Can someone explain me why this 620 Rupees Interest is applied? Is this how our Tax Department Accountants calculates taxes?