Per the statement of earnings for 2016-2018 (included in 2018 financial statement), GE has reported the negative tax expenses (or tax revenues) of $1,133 million and $2,611 million in FY 2016 and FY 2017 respectively. However, $583 million income tax expense is reported for FY 2018. How can GE report revenues from income taxes? Are they reliable? Can you explain the way tax expenses are measured?