Form 16 is a TDS certificate issued by employers to their employees under Section 203 of the Income Tax Act 1961. It certifies that the employer has deducted tax at source from the employee’s salary and deposited it with the government. It is not a discretionary document — issuing Form 16 by June 15 of the following year is a legal obligation on every employer who deducts TDS from salary.

What Form 16 is NOT: it is not proof of all your income. It does not cover FD interest, dividends, rental income, or capital gains. It does not replace the AIS or Form 26AS. It is specifically about your salary and the TDS your employer deducted — nothing more and nothing less.

Part A is not prepared by your employer — it is generated directly from the TRACES (TDS Reconciliation Analysis and Correction Enabling System) portal run by the Income Tax Department. This makes Part A the more authoritative of the two parts — the numbers here reflect what the government actually has on record as having been deposited.

Part B is prepared by the employer — not generated from a government system. This makes it important to verify Part B against your actual salary slips and investment declarations, because errors here are the employer’s, not the government’s. Part B shows the full computation of your taxable salary and the basis on which TDS was calculated.

The hierarchy when there is a conflict: AIS is the most comprehensive. Form 26AS is authoritative for TDS. Form 16 is the employer’s version — it can sometimes show amounts differently (perquisites, reimbursements) than AIS.

The practical rule before filing: Form 16 salary figure should closely match AIS salary. Minor differences can exist for legitimate reasons (non-taxable reimbursements, perquisites treated differently). A significant difference — ₹50,000 or more — needs to be investigated and explained before you file. Filing an ITR with a salary figure that sharply differs from AIS is a near-certain trigger for a 143(1) mismatch intimation.

1. 1Collect Form 16 — Check Validity
   Obtain Form 16 from your employer by June 15. It should come as a digitally signed PDF — either emailed directly or downloadable from your employer’s HRMS portal. A Form 16 without a digital signature is not valid. If you receive a Word or Excel file labelled “Form 16” — that is not the official certificate.
2. 2Verify PAN in Part A — First Priority
   Before reading anything else — check your PAN in Part A. Compare it character by character against your PAN card. Cross-check with Form 26AS (incometax.gov.in → Login → Form 26AS) — the TDS amount should appear against your PAN. If PAN is wrong — request a corrected Form 16 before doing anything else.
3. 3Download AIS and Compare Salary
   Login to incometax.gov.in → AIS → Taxpayer Information Summary. Find the salary figure in TIS. Compare with the gross salary in Form 16 Part B. Small differences are acceptable — a large gap requires investigation. If AIS shows more salary than Form 16 — you must declare the AIS figure in your ITR (the higher, AIS-verified amount).
4. 4Check Your Actual Deductions vs Form 16
   List all investments and deductions you actually made during the year: PPF contributions, LIC premium paid, health insurance premium, home loan interest, NPS, ELSS. Compare with what Part B shows. If Part B shows less than your actual (because you did not inform HR in time) — you will add the additional deductions yourself when filing the ITR. The ITR accepts your declaration — you are not limited to what Form 16 shows.
5. 5Decide Your Tax Regime
   If your employer computed TDS under Old Regime but you want to switch to New Regime for your ITR — or vice versa — this is allowed. Salaried employees can change regime at ITR filing. Calculate both to find which produces lower tax. Remember: both regimes now have ₹75,000 standard deduction.
6. 6File ITR Using Pre-Filled + Form 16 Data
   Login to incometax.gov.in → File ITR → Select AY 2026-27 → Choose ITR form (ITR-1 for simple salary, ITR-2 if you have capital gains or multiple properties). The pre-filled return pulls data from AIS and Form 26AS automatically. Verify each pre-filled field against your Form 16. Add any income not pre-filled (other sources, additional properties). Add any deductions not reflected. Submit.
7. 7Verify Within 30 Days
   After submitting — e-verify immediately using Aadhaar OTP. The 30-day verification window from filing date is non-negotiable. An unverified ITR is not a filed ITR.

If you changed jobs during FY 2025-26, you will receive two Form 16s — one from each employer. Combining them correctly is critical, because each employer only knows about the salary they paid, not the full-year picture. When the two salaries are added together, you may fall into a higher slab than either employer assumed.

The Standard Deduction Trap

Each employer claims ₹75,000 standard deduction in their Form 16 computation — because each employer sees their TDS picture independently. When you file your ITR with both Form 16s combined, standard deduction can only be claimed once — ₹75,000 total, not ₹1,50,000. The ITR portal handles this correctly when you add both employers — but always verify the standard deduction field shows ₹75,000, not ₹1,50,000.

From FY 2024-25 onwards, New Regime is the default. If you did not specifically inform your employer to use Old Regime, your Form 16 will show New Regime calculations. When you file your ITR, you can choose whichever regime produces lower tax — the ITR filing is the final determination, not the Form 16.

Case 1 — PAN Error in Part A — TDS Credit Missing

Rajesh received his Form 16 and immediately checked his PAN in Part A — a habit I had suggested to him the previous year. He found one alphabet wrong. His employer had filed quarterly TDS returns with the incorrect PAN. No TDS appeared in Rajesh’s Form 26AS as a result — the credit had gone to an unknown PAN. He contacted HR, who filed a TDS correction on TRACES. A revised Form 16 was issued. He filed his ITR only after the correction was reflected in Form 26AS — a delay of 10 days but completely worth it. Had he filed without noticing — he would have had a ₹89,000 tax demand for tax he had already paid.

Case 2 — Deductions Not Reflected in Form 16 — Extra Refund Claimed

Priya had invested ₹1.5L in PPF and ELSS but submitted her Form 12BB to HR only in December (after most TDS had already been deducted at higher rates for the April–November months). Her Form 16 Part B showed only ₹75,000 in 80C. When she filed her ITR, she added the full ₹1.5L 80C with her PPF passbook and ELSS statement as proof. The additional ₹75,000 deduction reduced her taxable income further and generated an additional ₹22,500 in refund. Form 16 showed ₹75K — ITR correctly showed ₹1.5L. Both are valid.

Case 3 — No Form 16 — Company Closed

Vikram’s employer shut down mid-year. No Form 16 was issued. He downloaded his AIS — salary of ₹9.8L was clearly shown, and TDS of ₹72,000 was credited to his PAN (the employer had deposited it before closing). He filed ITR-1 using AIS data. Pre-filled ITR already showed the correct salary and TDS. He submitted it, e-verified, and received his refund normally. Form 16 absence did not prevent filing — AIS and Form 26AS together had everything needed.

Case 4 — Multiple Form 16, Correct Handling

The job-change scenario — Sneha. After the tax shock of the first year (see earlier example), the second year she gave Form 12B to Company B when joining. Company B computed TDS on the combined ₹17.6L income picture from September onwards — deducting appropriately. When she filed her ITR combining both Form 16s, standard deduction was ₹75,000 (not double), and the additional TDS Company B had deducted covered the actual liability. Refund: ₹8,000. Contrast with prior year’s ₹1.76L demand.

Case 5 — Regime Switch at ITR Filing

Arun’s employer computed his TDS under New Regime (the default). His Form 16 showed New Regime calculations — no HRA, no 80C. But Arun paid ₹18,000/month rent, had ₹1.5L in investments, and a home loan with ₹1.8L interest. When he calculated Old Regime himself — his tax was ₹68,000 lower than the New Regime. At ITR filing, he switched to Old Regime, declared HRA (calculated), 80C, and home loan interest. His TDS had been cut under New Regime — the surplus became a ₹68,000 refund. Form 16 showed New Regime. ITR correctly showed Old Regime. Fully legitimate.
🔗 New vs Old Tax Regime — Which Is Better for You? 2026

Not verifying PAN in Part A before filing:
This is the single most important check and the most commonly skipped one. A wrong PAN in Form 16 Part A means the TDS credit is not against your PAN in the system. File after checking — not before.

Treating Form 16 as the complete income record:
Form 16 covers salary and salary TDS only. Your FD interest, dividends, rental income, and capital gains are not in Form 16. Always download AIS to see the complete picture. Filing an ITR based only on Form 16 — without checking AIS for other income — almost always creates a mismatch notice.

Claiming standard deduction twice when combining two Form 16s:
Each employer claims ₹75,000 standard deduction separately. When you combine both in your ITR, claim only ₹75,000 total. The ITR portal’s “Add Employer” functionality handles this correctly — but verify the final standard deduction field shows ₹75,000 not ₹1,50,000 before submitting.

Not claiming deductions not shown in Form 16:
If your employer did not reflect the full ₹1.5L 80C because you submitted Form 12BB late, or did not declare a health insurance premium, or made an NPS additional contribution — these are still claimable in your ITR. Form 16 shows only what the employer knew. Your ITR can reflect everything you actually did, with proper documentation.

Assuming Form 16 regime determines your ITR regime:
The regime your employer used for TDS and Form 16 does not bind your ITR. Salaried employees can choose their ITR regime independently each year. If New Regime Form 16 arrived but Old Regime saves ₹60,000 — switch at ITR filing. Calculate both before deciding.