Extended period of personal income tax exemption for income as far as paid for purchases investment units in the LTF, which does not exceed 500,000 Baht for three years. From the current, the exemption of personal income tax by deducting for the purchases investment units in the LTF between date 1 January 2008 and 31 December 2016. Change to the exemption of personal income tax by deducting for the purchases investment units in the LTF between 1 January 2008 and 31 December 2020.