Me and my family are coming to oz in sept on student visa 570 we have a house in uk no mortgage we are thinking about renting our property after the two year course if i pass we will then apply to become residents if we then sold our property in uk how will we go about the capital gains would we have to pay tax from what we bought the property for or when we rented the property out ? also we have been told we can claim our tax back what we have paid in uk since begining of tax year is this correct