Why 31 March Is Not Just a Year-End

Most taxpayers treat 31 March as the close of the financial year and nothing more. Tax professionals know it differently. The last day of the Tax Year is simultaneously: the advance tax final computation date, the Section 43B payment deadline, the MSME payment clearing deadline, the capital loss harvesting window close, the CGAS deposit verification point, and the investment-for-deduction final date.

Missing any one of these has tax consequences that cannot be reversed after midnight on 31 March. This checklist covers every material compliance point — organised by category — for the year-end of Tax Year 2026-27.