It's not too late if you missed submitting your rent details to your employer as proof to claim HRA tax deductions at the end of the month. You can do it when filing your income tax return, provided you have all your rent receipts and the rent agreement. Should you also miss claiming HRA while filing your income tax returns, you can file a revised return before the end of the financial year and claim your tax benefits. Thus, you can use this tool as an HRA arrears calculator. Read more