What each document means, why they often disagree, the exact mismatches that trigger Section 143(1) notices, and the seven-step reconciliation workflow used by Taxpex CAs.
Every Indian taxpayer with even one source of income now has THREE different documents reporting their financial activity to the Income Tax Department — Form 16 from the employer, Form 26AS from the TRACES portal and the Annual Information Statement (AIS) from the compliance portal. In a perfect world, all three would tell exactly the same story. In reality, they almost never do — and the mismatches are the single biggest reason taxpayers receive Section 143(1) intimations or, worse, full-blown Section 142(1) notices. This guide explains what each document means, why mismatches happen, which mismatch triggers which notice, and exactly how to reconcile them in seven steps before you press 'Submit'.
Form 16 is a TDS certificate issued by your employer under Section 203 of the Income Tax Act. It is issued annually by 15 June following the financial year, and comes in two parts:
If you changed jobs during the year, you receive one Form 16 from EACH employer. You must consolidate both in your ITR — don't rely on just one.
Form 26AS is your consolidated tax credit statement, available on the TRACES portal via the income-tax e-filing site. It reports:
Introduced in November 2021 and fully matured by 2026, AIS is the IT Department's most comprehensive view of your financial life. It captures every reported transaction — dividend, interest, mutual fund redemption, share sale, foreign remittance, property purchase/sale, GST turnover and more — from the source reporting entities. AIS reflects information from banks, AMCs, registrars (CAMS/KFin), brokers, sub-registrars, employers, GSTN and FIU-IND.
AIS is accessible from the IT e-filing portal → Services → Annual Information Statement → download as PDF or JSON.
TIS is the SUMMARY view of AIS — same data, but pre-aggregated by category (salary, interest, capital gains, dividends, etc.). Use AIS for verification and TIS for filing. If you submit feedback against an AIS entry, TIS auto-updates with the modified value.
| Feature | Form 16 | Form 26AS | AIS |
|---|---|---|---|
| Issued by | Employer | TRACES / CPC | CPC |
| Frequency | Annually (15 June) | Real-time | Real-time |
| Coverage | Only salary + employer TDS | TDS / TCS / advance tax / refunds / SFT | ALL financial transactions |
| Best for | Salary income verification | Tax credit verification | Full financial reconciliation |
| Editable by taxpayer? | No | No | Yes — feedback option |
| Used by CPC for matching? | Indirectly | Yes | Yes (primary in 2026) |
| Mismatch type | Notice section | Typical timeline |
|---|---|---|
| TDS in 26AS > TDS claimed in ITR | 143(1) — refund adjusted | 1–3 months after filing |
| TDS claimed in ITR > TDS in 26AS | 143(1)(a) — excess credit denied | 1–3 months after filing |
| AIS income > ITR income | 143(1)(a) / 139(9) | 1–6 months after filing |
| AIS shows SFT (high value) not in ITR | 133(6) — info gathering | 6–18 months |
| Property sale not reported in ITR | 148 — reassessment | Up to 10 years |
| Foreign asset in AIS not declared | Black Money Act notice | Indefinite |
Your bank deducted ₹5,000 TDS on FD interest of ₹50,000. Form 26AS shows only ₹3,000 because the bank made a return-filing error in Q4. Don't claim ₹5,000 in your ITR — claim ₹3,000 (what is in 26AS), then ask the bank to revise its return. Once revised, file a rectification under Section 154 to claim the remaining ₹2,000.
Form 16 shows full ₹1,00,000 TDS, but 26AS shows only ₹75,000 because the employer hasn't filed Q4 TDS return yet. Wait until late June for the deductor to file. Don't file your ITR before the credit appears, or face refund delay.
If you changed jobs and only declared one salary to the new employer, the new Form 16 will under-report your total income. AIS captures both because both employers reported. Always sum both Form 16s. Failure to do so triggers 143(1)(a) for under-reporting.
Perquisite value of ESOPs vested in the year often appears in AIS but is missing from Form 16 if your HR ran payroll before the vest date. Always check AIS 'Salary' section and add the missing perk value when filing.
AIS reports interest from every bank, NBFC, post office, bond and even peer-to-peer lender — most taxpayers report only the ones where TDS was deducted. Common scenarios:
Sub-registrar reports every property transaction in SFT-018 (immovable property purchase/sale). If you sold a flat for ₹80L but the stamp duty value was ₹95L, AIS reports ₹95L. Under Section 50C, the higher of the two is treated as sale consideration for capital gains. Always reconcile at the time of filing — and obtain a valuation report if the actual consideration is justifiably lower.
Foreign assets (bank accounts, RSUs, ESOPs in foreign parent companies, foreign mutual funds, foreign rental property) MUST be reported in Schedule FA of the ITR, irrespective of whether they generated income. The Black Money Act prescribes a ₹10 lakh PENALTY for each non-disclosure — over and above tax.
On the AIS portal, every transaction has an 'Optional' column to submit feedback. Choices include:
Once feedback is submitted, TIS recomputes the 'Modified Value' and your ITR will pre-fill from TIS — not raw AIS. Always download and retain the updated TIS PDF as filing evidence.
AIS is the most comprehensive and is increasingly used by CPC for auto-matching. Always reconcile your ITR with AIS first, then cross-check with 26AS and Form 16.
AIS captures every reported income — not just salary. Interest from savings, dividends, mutual fund gains, ESOP perks and second-employer salaries all appear in AIS but may be missing from Form 16.
You can, but you risk a 143(1)(a) notice for under-reporting. Always reconcile AIS before filing.
Log in to incometax.gov.in → e-File → Income Tax Returns → View Form 26AS → confirm redirect to TRACES → select Assessment Year → View as HTML / Download as PDF.
Log in to incometax.gov.in → Services → Annual Information Statement (AIS) → select FY → Download as PDF / JSON.
Claim only the TDS appearing in 26AS in your ITR. Ask the employer to revise the TDS return to align. Once corrected, file a rectification under Section 154 to claim the rest.
Yes — reporting entities make mistakes. Use the AIS feedback option to flag any incorrect entry.
Specified Financial Transactions — high-value transactions like cash deposits > ₹10L, credit card payment > ₹10L, mutual fund purchase > ₹10L. These are reported by banks/AMCs to the IT Department.
Yes. CPC's e-Verification scheme runs automated mismatch detection between ITR and AIS for every filed return.
TIS is the SUMMARY of AIS — aggregated per category — and is what auto-populates your pre-filled ITR. Always re-download TIS after submitting AIS feedback.
Absolutely — you must. AIS is a guide, not a limit. Cash income, foreign income or rent not deducted at source must still be self-declared.
Yes — for business owners, AIS now includes GSTR-3B and GSTR-1 summary data linked to your PAN.
Use feedback option 'Information relates to other PAN/year' or 'Information is denied' with a clear remark. TIS will exclude it from the modified value.
AIS is available from AY 2021-22 onwards on the compliance portal.
Yes — PPF interest, LTCG within ₹1.25L exemption, agricultural income are all shown for completeness, marked as exempt where applicable.
Yes — Section 199 allows you to claim TDS in the year the corresponding income is taxable, even if the TDS year differs. Disclose in Schedule TDS with the correct year reference.
Likely caused by an employer wrongly using your PAN. Submit AIS feedback 'Information relates to other PAN' and inform the employer in writing.
Minimum 7 years — the maximum reassessment window u/s 148 is currently 10 years for income above ₹50L.
No. Foreign assets must be reported in Schedule FA. Non-disclosure attracts Black Money Act penalties of ₹10L per default.
Respond on the e-filing portal within 30 days — either accept the proposed adjustment and pay or disagree and file a revised return / rectification with explanation and proof.
Form 16, 26AS and AIS are not three competing versions of the truth — they are three lenses through which the IT Department sees your finances. Mismatches are routine; treating them seriously, reconciling line-by-line and submitting AIS feedback BEFORE filing your ITR is what separates a smooth refund from a 143(1) notice. Make this seven-step workflow part of your annual filing ritual — or hand it to a Taxpex CA and we'll do it for you.
Senior contributor at Taxpex Consultancy. Reviewed by a practising Chartered Accountant. Published on 10 June 2026 · Updated on 10 June 2026.
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via Income Tax Calculator FY 2025-26Form 16 is for salary TDS (annual); Form 16A is for non-salary TDS (quarterly).
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