Deceased father - Income Tax

My father passed away recently. My mother will receive sb account proceeds and family pension. She is also joint holder of a house property owned by my father which she intends to sell. How to file income tax returns of my father. My doubts as below 1. How to show the income received by way of amount received from my father s sb account in the returns of my mother 2 how to show the family pension amount received by my mother in the returns 3 how to show the proceeds from sale of property in the returns of my mother Thanks in advance