10 July 2014
Sec 234B relates to the interest payable on the short payment of Advance Tax. if any assessee fails to pay the 90% of its assessed tax by 31st of March of the previous year to which such liability relates shall pay the above interest on the shortfall from the 1st day of AY to till the payment of Tax.
So if you pay the balance tax on 20.04.14 then you have to pay interest @1% for 1 month on Rs 90000/-