ITR Filing AY 2026-27: Deadlines, Common Mistakes, Wrong ITR Forms, AIS Mismatch and Verification

Introduction

Many taxpayers wait until the last few days to file their Income Tax Return. This increases the risk of wrong form selection, missed income, AIS mismatch, incorrect tax regime selection and failure to verify the return.

For AY 2026-27, taxpayers must be extra careful because several changes affect ITR filing, including:

• different filing deadlines for different taxpayer categories;
• new regime being the default regime;
• ITR-1/ITR-4 eligibility changes;
• foreign asset reporting for RSUs/ESOPs;
• capital gains reporting;
• Form 16 vs AIS vs Form 26AS mismatch;
• e-verification within 30 days;
• over-reliance on AI tools.

This article explains the major mistakes taxpayers should avoid before filing ITR for AY 2026-27.

For ITR filing, AIS reconciliation and notice support, visit TaxClear.in.

Why You Should Not Wait Until the Last Date

Many taxpayers assume that the ITR deadline will be extended. This is risky.

If you delay filing until the last few days, you may face:

• portal slowdown;
• bank challan delay;
• mismatch in AIS/Form 26AS;
• wrong ITR form selection;
• missed deductions;
• wrong tax regime selection;
• missed foreign asset disclosure;
• e-verification delay;
• late filing fee and interest.

The safer approach is to start early, reconcile data and file accurately.

ITR Filing Due Dates for AY 2026-27

Different taxpayers have different due dates.

Taxpayer Category	ITR Due Date for AY 2026-27
Salaried individuals / non-audit cases	Generally 31 July 2026
ITR-4 presumptive business/profession cases	31 August 2026
Tax audit cases	31 October 2026
Transfer pricing cases	30 November 2026

Always check the exact due date applicable to your case before filing.

Late Filing Fee

If the return is filed after the due date, late filing fee may apply.

Total Income	Late Fee
Up to ₹5 lakh	₹1,000
Above ₹5 lakh	₹5,000

Interest may also apply if tax is payable.

Mistake 1: Choosing the Wrong ITR Form

Wrong ITR form selection is one of the most common mistakes.

There are four main ITR forms used by individual taxpayers:

• ITR-1;
• ITR-2;
• ITR-3;
• ITR-4.

Each form has different eligibility rules.

ITR-1: For Simple Resident Cases

ITR-1 is for eligible resident individuals with simple income.

It may cover:

• salary or pension;
• income from up to two house properties, subject to form conditions;
• interest income;
• family pension;
• dividend income;
• agricultural income up to ₹5,000;
• long-term capital gain under Section 112A up to ₹1.25 lakh.

When ITR-1 Cannot Be Used

ITR-1 cannot be used if the taxpayer has:

• short-term capital gains;
• LTCG under Section 112A exceeding ₹1.25 lakh;
• foreign assets;
• foreign income;
• signing authority outside India;
• unlisted equity shares;
• deferred ESOP tax;
• total income exceeding ₹50 lakh;
• brought-forward loss or loss to be carried forward;
• business/professional income.

So, a salaried taxpayer with foreign RSUs, ESOPs, foreign shares or foreign assets should not blindly file ITR-1.

ITR-2: For Capital Gains and Foreign Assets Without Business Income

ITR-2 is used by individuals/HUFs who are not eligible for ITR-1 and do not have business or professional income.

ITR-2 is commonly used where the taxpayer has:

• capital gains;
• foreign assets;
• RSUs/ESOPs;
• income from more complex house property situations;
• total income above ₹50 lakh;
• unlisted equity shares;
• foreign income;
• brought-forward capital loss;
• sale of property;
• sale of shares or mutual funds.

ITR-3: For Business, F&O and Intraday Traders

ITR-3 applies where the taxpayer has business or professional income.

This includes many cases of:

• F&O trading;
• intraday trading;
• freelancing;
• business income;
• professional income;
• proprietorship income.

A common mistake is that F&O or intraday traders choose ITR-2 instead of ITR-3. This can make the return incorrect.

ITR-4: For Presumptive Income Cases

ITR-4 is for eligible resident individuals, HUFs and firms other than LLPs having presumptive income under sections such as 44AD, 44ADA or 44AE.

ITR-4 may cover:

• presumptive business income;
• presumptive professional income;
• salary/pension;
• income from up to two house properties, subject to conditions;
• interest/family pension/dividend;
• LTCG under Section 112A up to ₹1.25 lakh.

ITR-4 cannot be used in many complex cases, including short-term capital gains, foreign assets, foreign income, LTCG u/s 112A above ₹1.25 lakh and cases involving losses to be carried forward.

Quick ITR Form Selection Table

Situation	Likely ITR Form
Simple salary + interest	ITR-1
Salary + LTCG u/s 112A up to ₹1.25 lakh	ITR-1, if otherwise eligible
Salary + STCG	ITR-2
Salary + mutual fund capital gains	ITR-2
Salary + house sale	ITR-2
Salary + foreign RSUs/ESOPs	ITR-2
Foreign assets / Schedule FA	ITR-2
F&O trading	ITR-3
Intraday trading	ITR-3
Freelancing as business/profession	ITR-3
Presumptive business/profession	ITR-4, if eligible

Mistake 2: Missing Foreign Asset Reporting

Foreign asset reporting is a major compliance area.

Many employees of multinational companies receive:

• RSUs;
• ESOPs;
• shares of foreign parent company;
• foreign brokerage accounts;
• foreign bank accounts;
• foreign retirement accounts.

Even if no shares are sold and no gain is realised, foreign assets may still need to be disclosed in Schedule FA if the taxpayer is resident and ordinarily resident in India.

Why RSUs and ESOPs Matter

RSUs and ESOPs are often treated casually by employees because they may not have sold the shares.

But if the taxpayer holds foreign shares or rights in a foreign company, Schedule FA reporting must be checked.

Failure to report foreign assets can lead to serious notices and penalties.

For foreign asset reporting and Schedule FA filing, visit TaxClear.in.

Mistake 3: Ignoring Capital Gains

If you sold shares, mutual funds, property or other capital assets, the transaction should be reviewed and reported correctly.

Capital gains may arise from:

• listed shares;
• equity mutual funds;
• debt mutual funds;
• international funds;
• property;
• gold;
• bonds;
• unlisted shares.

Even if the gain is small, or there is a loss, the transaction may appear in AIS and should be reconciled.

Property Sale: Gain or Loss Must Be Reported

If you sell a house or land, there will generally be either a capital gain or a capital loss.

Do not ignore the transaction.

For property sold on or after 23 July 2024, long-term capital gains are generally taxed at 12.5% without indexation. However, resident individuals and HUFs can opt for 20% with indexation for land/building acquired before 23 July 2024 if it gives a lower tax liability.

Therefore, in eligible property cases, compare:

Option	Treatment
12.5% without indexation	New capital gains rule
20% with indexation	Available to eligible resident individual/HUF for old land/building acquired before 23 July 2024

This comparison can save tax in many cases.

Mistake 4: Selecting the Wrong Tax Regime

The new tax regime is the default regime.

This means that if a taxpayer wants the old regime, they must consciously select it while filing ITR.

For non-business taxpayers, regime selection can generally be made in the ITR each year. For taxpayers having business/professional income, Form 10-IEA rules may apply.

New Regime vs Old Regime

Point	New Tax Regime	Old Tax Regime
Default regime	Yes	No
Slab rates	Lower	Higher
Common deductions	Limited	More deductions available
HRA	Generally not available	Available if eligible
80C	Generally not available	Available
80D	Generally not available	Available
Home loan interest for self-occupied property	Generally not available	Available subject to limits
Best for	Taxpayers with fewer deductions	Taxpayers with high deductions

Many taxpayers will benefit from the new regime, but higher-income taxpayers with substantial deductions should still compare both regimes.

For old-vs-new regime comparison, visit TaxClear.in.

Mistake 5: Not Matching Form 16, AIS, TIS and Form 26AS

Before filing ITR, taxpayers should check all major data sources.

Key Documents to Match

Document	What It Shows
Form 16	Salary, deductions and TDS by employer
Form 26AS	TDS/TCS, tax payments and tax credits
AIS	Detailed financial information reported against PAN
TIS	Summary of taxpayer information
Pre-filled ITR	Department’s auto-filled data
Bank statements	Actual interest, rent, deposits and receipts
Broker reports	Capital gains and trading details

If these do not match, a notice may come.

Common Mismatches

Mismatch	Possible Issue
Form 16 salary differs from ITR	Wrong salary entry
TDS in Form 26AS not claimed	Refund loss
TCS missing from pre-filled ITR	Manual entry required
AIS shows interest not reported in ITR	Under-reporting
AIS shows mutual fund redemption	Capital gain schedule needed
Dividend appears in AIS but not in ITR	Mismatch notice
RSUs/foreign shares not reported	Schedule FA risk

Mistake 6: Relying Blindly on AI Tools

AI tools are helpful for understanding tax concepts, but taxpayers should not blindly rely on them for filing ITR.

AI may make mistakes because:

• tax laws change frequently;
• slab rates change;
• ITR utilities change;
• capital gain rules change;
• foreign asset rules are complex;
• AI may miss facts;
• AI may give generic answers;
• AI may not know the latest portal validation rules.

Use AI as an assistant, not as a substitute for professional review.

Safe Way to Use AI for Tax Filing

Unsafe Use	Safer Use
Asking AI to decide final ITR form without facts	Use AI for checklist, then verify
Uploading PAN, Aadhaar and bank statements to unknown tools	Remove sensitive data
Blindly trusting regime comparison	Recalculate on portal/professional software
Filing based on AI answer alone	Check Form 16, AIS, 26AS and tax computation
Using outdated tax law answer	Verify from official sources

For accurate ITR filing and review, visit TaxClear.in.

Mistake 7: Missing Deductions or Tax Credits

Pre-filled ITR data may not include every deduction or credit correctly.

Taxpayers should manually verify:

• Section 80C;
• Section 80D;
• NPS deduction;
• home loan interest;
• donations;
• TDS;
• TCS;
• advance tax;
• self-assessment tax;
• foreign tax credit, where applicable.

Do not assume that pre-filled data is complete.

Mistake 8: Not Reporting TCS

TCS may appear in Form 26AS/AIS but may not always auto-fill correctly.

Examples where TCS may arise:

• foreign remittance;
• foreign tour package;
• sale of certain goods;
• LRS payments;
• other specified transactions.

If TCS is shown in Form 26AS but not claimed in ITR, refund or credit may be missed.

Mistake 9: Forgetting ITR Verification

Filing ITR is not complete until it is verified.

ITR verification can be done through:

• Aadhaar OTP;
• net banking;
• bank account EVC;
• demat account EVC;
• DSC, where applicable;
• physical ITR-V sent to CPC.

The return must be e-verified or ITR-V must be submitted within 30 days from filing.

If the return is not verified within the prescribed time, it may be treated as invalid or the date of verification may be treated as the date of filing, causing late filing consequences.

Best Practice

Verify the ITR immediately after submission.

Do not select “Verify Later” unless absolutely necessary.

Mistake 10: Filing in a Hurry Without Review

Before submitting ITR, review:

Item	Check
Name and PAN	Correct
Bank account for refund	Validated
Tax regime	Correct
ITR form	Correct
Salary	Matches Form 16
TDS	Matches Form 26AS
Interest	Matches bank/AIS
Dividend	Reported
Capital gains	Reported
Foreign assets	Reported if applicable
Deductions	Claimed correctly
Tax payable/refund	Verified
E-verification	Completed

Practical Example 1: Salaried Employee With RSUs

A salaried employee working for an MNC receives foreign company RSUs but does not sell them.

Question	Answer
Can ITR-1 be used?	Generally no, if foreign assets reporting applies
Is capital gain necessary?	Only if sold/exercised as applicable
Is Schedule FA required?	Check residential status and asset details
Better form	ITR-2, if no business income

Practical Example 2: F&O Trader Files ITR-2

A taxpayer has salary income and F&O loss but selects ITR-2.

Issue	Impact
F&O is generally business income	ITR-3 may be required
Wrong ITR form	Defective/wrong return risk
Loss carry-forward	Correct reporting needed
Tax audit check	Required depending on turnover/loss facts

Practical Example 3: TCS Missing from Pre-Fill

A taxpayer has TCS appearing in Form 26AS but it is not pre-filled in ITR.

Step	Action
Check Form 26AS	Confirm TCS
Check AIS/TIS	Match entry
Enter manually if needed	Claim credit
Keep proof	For future mismatch

Practical Example 4: Property Sale

A taxpayer sells a house and assumes that because money was reinvested, no reporting is needed.

This is wrong.

Even if exemption under Section 54 or another section is claimed, the sale and capital gains computation should be reported in ITR.

ITR Filing Checklist for AY 2026-27

Before filing, check:

1. Correct ITR form selected?
2. Correct tax regime selected?
3. Form 16 matched?
4. AIS downloaded and checked?
5. TIS reviewed?
6. Form 26AS checked?
7. TDS/TCS fully claimed?
8. Capital gains reported?
9. Foreign assets disclosed?
10. F&O/intraday reported in correct form?
11. Deductions verified?
12. Bank account pre-validated?
13. Self-assessment tax paid, if needed?
14. ITR verified within 30 days?

TaxClear View

The most common ITR filing mistakes are not always related to tax calculation. Many mistakes happen because taxpayers:

• choose the wrong ITR form;
• ignore AIS;
• rely only on Form 16;
• miss TCS/TDS credits;
• fail to report foreign assets;
• select the wrong tax regime;
• forget e-verification;
• blindly rely on AI answers.

A correct ITR is not just about filing quickly. It is about matching the return with all reported data and making complete disclosures.

For professional ITR filing, foreign asset reporting, F&O tax filing, AIS reconciliation and notice prevention, visit TaxClear.in.

Key Takeaways

• Do not wait for deadline extension.
• Late filing fee can go up to ₹5,000.
• Select ITR-1, ITR-2, ITR-3 or ITR-4 carefully.
• F&O and intraday traders should generally check ITR-3 applicability.
• Foreign RSUs/ESOPs may require Schedule FA reporting.
• Form 16 alone is not enough.
• Match AIS, TIS, Form 26AS and pre-filled ITR data.
• New tax regime is default from AY 2024-25.
• Compare old and new regime before filing.
• Property sale must be reported even if exemption is claimed.
• For eligible old property cases, compare 12.5% without indexation vs 20% with indexation.
• Use AI only as an assistant, not as final tax authority.
• E-verification within 30 days is mandatory.

Conclusion

ITR filing for AY 2026-27 requires careful review. Taxpayers should not simply upload Form 16 and submit the return.

Before filing, check the correct ITR form, tax regime, Form 16, AIS, TIS, Form 26AS, capital gains, foreign assets, deductions, TDS/TCS and final tax payable.

Most importantly, verify the return immediately after filing.

For ITR filing, AIS/Form 26AS reconciliation, foreign asset reporting, capital gains filing, F&O ITR and tax notice support, visit TaxClear.in.