This document provides information about BIR Form 1701-A, the income tax return form that must be filed in the Philippines. It discusses who must file the form based on income thresholds for different filing statuses. It also outlines when and where the form must be filed each year, noting it is due by April 15 to the local Revenue District Officer. The document explains what factors like exemptions, deductions, and the nature of income affect the tax computation. It defines gross compensation income and gross income for tax purposes.