What are some key tasks that taxpayers should complete before the March 31 deadline?

Taxpayers should complete key tasks before March 31 deadline to avoid penalties and maximise deductions, reported Moneycontrol. One of the key dates is March 15, the last day to pay the final instalment of advance tax for FY 2025–26. Other tasks are making tax-saving investments, submitting investment proof to employers, downloading home-loan interest certificates, and reporting foreign income.