ITR-4 (Sugam) for AY 2026-27 is designed for small taxpayers opting for presumptive taxation under Section 44AD, Section 44ADA and Section 44AE. This guide explains eligibility conditions, latest changes including reporting of two house properties and bank balance disclosure, due dates, and step-by-step filing process. Ensure correct compliance and avoid notices by understanding when ITR-4 is applicable and when to switch to ITR-3.