Kindly clarify whether husband had executed any will bequeathing property to his wife
2) if so apply for mutation of property in wife name enclose death certificate, copy of his will , latest receipt of payment of property taxes
3) if no objections are received property would be mutated in wife name
4) she should contact her CA file his income tax returns
5) if husband dies intestate then under provisions of Indian succession act ,If no lineal descendants have been left but other kindred are alive, one-half of the estate passes to the widow and the rest to the kindred. And if no kindred are left either, the whole of the estate shall belong to his widow.