This document provides a summary of key amendments to the personal income tax provisions in the TRAIN Law (Republic Act No. 10963) as compared to the previous tax code under Republic Act No. 8424. Some of the key changes summarized include the introduction of new personal income tax brackets from 2018 to 2022 and for 2023 onwards, changes to the tax treatment of certain types of income like lottery winnings, interest income from foreign currency deposits, and capital gains from the sale of non-traded stocks. It also discusses the tax treatment of self-employed individuals and mixed income earners. One amendment related to preferential tax rates for certain regional headquarters and petroleum contractors was vetoed by the President.