Form 16 Explained: How to Read It and File Your ITR

Form 16 is the single most-referenced document at ITR filing time for salaried taxpayers, yet most people only glance at the final tax figure and skip the rest. Reading it properly helps you catch employer errors, understand exactly how your tax was computed, and file a return that matches what the tax department already has on record.

What Exactly Is Form 16?

Form 16 is a TDS certificate that every employer deducting tax on salary is required to issue to each employee, under Section 203 of the current Act. It certifies how much salary was paid during the financial year and how much tax was deducted and deposited against the employee's PAN. It is issued annually, typically covering the period April to March, and is expected to be reorganised under a new certificate framework once the Income Tax Act 2025 provisions for TDS certificates take prospective effect from FY 2026-27; the underlying obligation to certify salary TDS is not going away.

Part A vs Part B: What Each Section Shows

Part A is the more reliable of the two because it is system-generated from data the employer has actually filed with the tax department. Part B is only as accurate as the declarations and proofs the employee submitted to the employer during the year, so it is worth reviewing carefully, especially the deduction section, before relying on it.

Reading Part B Line by Line

Part B typically walks through gross salary, followed by exemptions under Section 10 such as house rent allowance and leave travel allowance (relevant only under the old regime), the standard deduction, income or loss from house property if declared to the employer, and Chapter VI-A deductions such as Section 80C and Section 80D. It closes with the total taxable income, the tax computed on it, and the tax already deducted through the year, reconciled against what was actually paid in.

If you are on the new tax regime, which has been the default since FY 2023-24, most of these exemptions and Chapter VI-A deductions simply will not appear, and Part B will be a much shorter computation built mainly around the standard deduction and the applicable slab rates.

Cross-Check Against Form 26AS and AIS Before Filing

Form 16 is prepared by your employer, but the tax department's own record of your income and TDS comes from Form 26AS and the Annual Information Statement (AIS), both viewable through the income tax e-filing portal. Before filing, compare the TDS amount and PAN details in Form 16 against Form 26AS. A mismatch usually points to one of a few causes:

• The employer deposited TDS late or filed the TDS return after the due date
• A PAN quoting error in the employer's TDS return
• TDS deducted but not yet reflected because the employer's return for that quarter has not been processed

Filing your return using the Form 16 figure when Form 26AS shows something different risks a mismatch notice later, since processing is done against Form 26AS/AIS data. Flag any discrepancy to your employer's payroll or finance team promptly so a correction (revised) TDS return can be filed if the error is on their end.

Due Date and What Happens If Your Employer Is Late

Employers must issue Form 16 for a financial year by June 15 of the following year. If they miss it, a penalty of Rs 100 per day of default applies to the employer under Section 272A(2)(g), continuing until the certificate is issued. This penalty is the employer's liability, not yours, but a late Form 16 can still compress the time you have to review and file your own return before the ITR due date.

Filing Your ITR Without Waiting on Form 16

A delayed or missing Form 16 is not a reason to delay your own filing. You can reconstruct the required figures from your monthly payslips, the salary structure your employer shared at the start of the year, and Form 26AS/AIS for the TDS side. This takes more manual reconciliation than working off a ready-made Form 16, but it is entirely workable, and it is the safer option if the ITR due date is approaching and the employer still has not issued the certificate.

Common Mistakes Taxpayers Make With Form 16

• Treating Part B deductions as final without proof: if you submitted proofs late in the year, some declared deductions in Part B may not have been fully verified; keep your own receipts regardless.
• Ignoring income from a previous employer: if you switched jobs during the year, each employer issues its own Form 16 and you need to combine both when computing total taxable income; a single employer's Form 16 will understate your total income.
• Not checking the regime assumption: confirm which regime your employer computed TDS under, since that determines whether HRA and Chapter VI-A deductions were factored in at all during the year.

Once you have your Form 16 reconciled against Form 26AS/AIS, the actual ITR filing is largely a matter of transposing verified figures correctly into the right schedule for your income type.