cash from father

Jagdish Sharma (16 Points)

28 July 2018  
After six month of death of my Father I have deposited cash 4 lac in FY 2015-16 in saving account... That amount is of my father's cash... Which amount didn't shown in my ITR as income of FY 2015-16... ITR is of 3 lac...
Can it department impose any addition...?
what is the penalty calculation method...?
How much penalty...?