Non filing of income tax for 2013-14

Hello,

I got a notice from the income tax officer for non filing of my income tax return for the year 2013-14.

Actually, I am a house wife and my husband had transferred money to my account which i invested in FDs and Mutual funds.

I didn't file my returns. The intrest amount is around 5-6 lacks.

Please advice me on what I should be doing now? I am really scared and worried