Income tax query on nsc interest

Sir,

I have 60K NSC which gives around 36K interest. The maturity was in Feb,14 (FY 13-14). However, I have not submitted the NSCs yet and I will do that now in April,14 (FY 14-15). So I will actually get the cheque in new FY so when do i have to show it as additiona income and when should I pay the taxes on that?

Please guide me on this.

Thank you,

Manoj