Tax :compensation recvd against acquisition of land/property

vivek (sm) (31 Points)

17 September 2017  

 land and house property in the name of my mother (land purchaeed in 1990s and house constructed by father by his retirement savings in 1994) is going to be acqired by govt for railway expansion project.She is a housewife and hasn't filed income tax return.What will be the tax treatment for compensation received against the acquisition by govt.

how will the cost of acquisition calculated for the difference amount (compensation - cost of acquisition)