computation on capital gain of sell of ancestral land

satendra (agriculture) (43 Points)

20 February 2017  
sir I have recieved a notice from income tax department India . my father sold the agriculture land in December 2012 . which was the ancestral land. now we have received a letter/notice from income tax department that

1. provide the details of computation of capital gain received by sell of immovable property.


what can I do sir now. please help me