Self assessment tax- interest, payment (11c/n11c) ??

Hi,

I have earned 66,000 as interest from investing with private firm and TDS on the has been deducted by that firm.

Now while filing return I see that clubbing this income/interest with salary income, I owe 7070 as outstanding tax (as some of the clubbed income falls in 30% bracket).

Out of my total tax liability I have paid more than 90%.

Will I have to pay penelty/interest on the remaining? I read somwhere I should not

If yes- How much?

If not- What should be the penelty code while paying additional amount through the bank? -  11C or N11C?

Also how to split 7070 in between tax and E Cess (is 6864+206=7070) correct?

AY is 2014-15. 

Thanks in advance

YP