How to Read Your Form 16 and Catch Errors Before Filing

Your Form 16 usually lands in your inbox sometime in June, and most people do exactly one thing with it: glance at the total tax figure at the bottom and forward the file to whoever's preparing their return. That's a habit worth breaking. Form 16 is your employer's own account of what you earned and what tax they deducted on your behalf, and payroll teams get details wrong more often than you'd expect — a mismatched PAN, a missed investment proof, income from a previous employer that never made it into the calculation. A few minutes spent actually reading it before you file can save you a delayed refund or a notice you don't see coming.

Part A vs Part B: They're Not the Same Document

Form 16 arrives as two parts, and though they're stapled together in most PDFs, they serve genuinely different purposes and come from different places. Part A is generated by your employer through the TRACES portal — the government's own TDS system — and it's essentially a compliance record rather than a computation of your tax. Part B is the annexure your employer prepares separately, and it's the part that actually explains how your tax was worked out, salary component by salary component. Confusing the two, or checking only one, is how errors slip through unnoticed. Here's how they compare:

Cross-Check Against Form 26AS and AIS Before You Trust Either Number

Form 16 is only your employer's version of events, and it only covers what your employer knows about. Form 26AS is the tax department's own consolidated record of every rupee of TDS or TCS credited against your PAN — not just from this employer, but from banks, a previous employer if you switched jobs mid-year, and anyone else who deducted tax on your behalf. AIS, the Annual Information Statement, goes further still, listing dividends, interest, mutual fund and share transactions, and other financial information the department has linked to your PAN, much of which never appears on Form 16 at all simply because your employer has no visibility into it. The working rule: Part A of Form 16 should match Form 26AS rupee for rupee on the salary TDS entries; if it doesn't, something went wrong on the deposit side. AIS needs to be checked separately, for income Form 16 was never designed to capture in the first place. It's also worth remembering that AIS tends to update through the year as more deductors file their statements, so a figure that looks incomplete in June might look different by August — check it again closer to when you actually file.

Common Errors Worth Hunting For

• PAN mismatch: a single wrong digit on your PAN with the employer, and your TDS may not reflect correctly in your 26AS or AIS at all.
• TDS deducted but deposited late, or not deposited at all: shows up as a gap between what Part B says was deducted and what Part A actually confirms was paid to the government.
• Previous employer's income left out: if you switched jobs mid-year and didn't submit Form 12B to your new employer, the new employer's Form 16 may miss part of your total income, or double-count the standard deduction between the two employers.
• Exemptions calculated on stale information: HRA or investment declarations submitted early in the year but never updated with the final proofs, leaving Part B out of step with what you actually paid in rent or invested.
• Plain clerical slips: a wrong assessment year, a transposed figure in the salary breakup, or an incorrect employer TAN.

What to Do If You Find a Mistake

Go to your employer's payroll or finance team first — not the tax department. Form 16 is generated from the TDS return your employer filed, so only they can correct it at the source, by filing a revised TDS statement. Once that's done, the corrected figures flow through to a reissued Form 16 and an updated Form 26AS and AIS. This process can take a few weeks, so flag any discrepancy the moment you spot it rather than a few days before your filing deadline. If a fix is going to take longer than you have, remember that the tax department treats Form 26AS and AIS, not Form 16 itself, as the authoritative record of your TDS credit — so you can still file an accurate return based on your real income and the credit actually reflected there, keeping your payslips, investment proofs, and any correspondence with your employer on hand in case a query comes up later. It also helps to keep a personal tally through the year — payslips, investment proofs, rent receipts — rather than reconstructing everything from memory once Form 16 finally arrives.

Treat Form 16 as a draft worth verifying, not a final answer to copy blindly into your return. Five minutes spent cross-checking it against 26AS and AIS now is far cheaper than untangling a mismatch notice months later — and worth doing especially this year, since this is likely one of the last Form 16s you'll see under the old Act's familiar 'assessment year' language before 'tax year' terminology starts showing up on the ones your employer issues next.