ITR Filing Guide AY 2026-27: New Forms, Deadlines, and What Has Changed for Small Businesses

The ITR filing season for AY 2026-27 has officially begun. With the Income Tax Act 2025 replacing the 1961 Act, CBDT has notified completely restructured ITR forms. Whether you run a small business, work as a freelancer, or earn a salary, the forms you file this year look different from last year.

Here is everything you need to know before you file.

New Tax Year Concept: What Changed

Previously, taxpayers had to track two separate terms:

• Financial Year (FY): the year in which income was earned
• Assessment Year (AY): the following year in which that income was assessed and taxed

Starting April 1, 2026, the unified Tax Year concept simplifies this. Tax Year 2026-27 covers income earned from April 1, 2026 to March 31, 2027. Filing for this income happens within the same tax year framework.

For AY 2026-27, you are filing returns on income earned during FY 2025-26 (April 1, 2025 to March 31, 2026). This is the last cycle using the old terminology before the new system fully takes over.

Which New ITR Form Applies to You

CBDT has notified new ITR Forms 1 through 7 under the Income Tax Rules 2026. The form numbering remains the same, but internal structures have been updated.

ITR-1 (Sahaj)

For resident individuals with total income up to Rs 50 lakh from salary, one house property, other sources (interest, dividends), and agricultural income up to Rs 5,000.

ITR-2

For individuals and HUFs who do not have income from business or profession. This includes those with capital gains, foreign income, or multiple house properties.

ITR-3

For individuals and HUFs who have income from business or profession (not opting for presumptive taxation). This is the form for most small business owners maintaining regular books of accounts.

ITR-4 (Sugam)

For individuals, HUFs, and firms (other than LLP) opting for presumptive taxation under Sections 44AD, 44ADA, or 44AE. Suitable for small businesses with turnover up to Rs 3 crore (if digital receipts exceed 95%) or professionals with gross receipts up to Rs 75 lakh.

ITR-5

For LLPs, AOPs, BOIs, and other entities not filing ITR-7.

ITR-6

For companies other than those claiming exemption under Section 11.

ITR-7

For trusts, political parties, institutions, and other entities required to file under specific sections.

ITR-V and ITR-U

ITR-V is the verification form submitted after e-filing (if not e-verified). ITR-U is the updated return form, available for filing corrections within 24 months of the end of the relevant assessment year.

Revised Deadlines for AY 2026-27

The permanent shift of the ITR-3 and ITR-4 (audit cases) deadline to August 31 means business owners with audit obligations no longer need to rush for July 31. However, the tax audit report itself should be completed well before the filing date.

Key Changes for FY 2025-26 vs Prior Year

1. Restructured form layouts: All ITR forms now align with the Income Tax Act 2025 section numbering. References to old Act sections (like Section 80C, 80D) have been mapped to their new equivalents.

2. Simplified schedules: Several overlapping schedules have been merged. The capital gains schedule now follows a cleaner structure with separate reporting for short-term and long-term gains.

3. Stricter HRA documentation: If you claim House Rent Allowance, landlord PAN is now mandatory for annual rent exceeding Rs 1,00,000. Without the landlord's PAN, the deduction may be disallowed.

4. Enhanced digital reporting: CBDT's analytics integration means pre-filled data from Form 26AS, AIS (Annual Information Statement), and TIS (Taxpayer Information Summary) will be more comprehensive. Verify every pre-filled entry before submitting.

5. New Tax Year field: Forms now include a specific field for "Tax Year" alongside the transitional AY reference.

Pre-Filing Reconciliation Checklist

Before you start filling your ITR, complete this checklist:

Income Verification

• Download Form 26AS from the TRACES portal and match TDS entries with your records
• Check Annual Information Statement (AIS) for all reported transactions (mutual funds, property, high-value purchases)
• Verify salary details against Form 130 (the new TDS certificate replacing Form 16)
• Reconcile bank interest across all savings and fixed deposit accounts

Deduction Documents

• Collect investment proofs: PPF, ELSS, life insurance, NPS statements
• Gather medical insurance premium receipts (Section 80D equivalent)
• Compile home loan interest certificates from your lender
• Keep rent receipts and landlord PAN ready if claiming HRA

Business Income (ITR-3/ITR-4 Filers)

• Reconcile GST returns (GSTR-3B) with books of accounts
• Verify turnover figures match GST annual return and ITR
• Confirm presumptive taxation eligibility thresholds
• Check for any pending advance tax shortfalls

Final Checks

• Verify bank account details (IFSC, account number) for refund credit
• Link Aadhaar with PAN (mandatory for filing)
• Choose between old and new tax regime before filing (regime lock applies for business income)

Common Mistakes to Avoid

1. Not checking AIS before filing. The Income Tax Department now receives data from multiple sources. Any mismatch between AIS and your return will trigger a notice.

2. Filing under the wrong form. A salaried individual with capital gains from mutual fund redemption cannot use ITR-1. They must use ITR-2.

3. Missing the advance tax interest calculation. If your tax liability exceeds Rs 10,000 after TDS, interest under Section 234B and 234C applies on shortfalls.

4. Ignoring the regime choice. Selecting the wrong tax regime (old vs new) can result in paying more tax than necessary. Run calculations under both before deciding.

Let TaxGarden Handle Your ITR Filing

Filing under the new ITR forms with restructured schedules and updated section references requires careful attention. TaxGarden's tax compliance services cover form selection, document preparation, AIS reconciliation, and timely filing for individuals and businesses.

Frequently Asked Questions

When does ITR filing for AY 2026-27 start?

ITR filing for AY 2026-27 opened on April 1, 2026. The deadline for non-audit cases is July 31, 2026, and for audit cases (ITR-3, ITR-5, ITR-6) it is August 31, 2026.

What is the difference between Tax Year and Assessment Year?

The new Tax Year concept merges the old Financial Year and Assessment Year into a single term. Tax Year 2026-27 runs from April 1, 2026 to March 31, 2027. For AY 2026-27, you are still filing on FY 2025-26 income under the transitional framework.

Can I still use the old tax regime for AY 2026-27?

Yes, both the old and new tax regimes are available. However, if you have business income, the regime choice is locked once selected and cannot be changed year to year without specific conditions.

What happens if I file ITR after the deadline?

A belated return can be filed until December 31 of the assessment year, but you will face a late fee of up to Rs 5,000 under Section 234F and lose the ability to carry forward certain losses.

Is Aadhaar-PAN linking mandatory for filing?

Yes, Aadhaar must be linked with PAN to file ITR. If not linked, your PAN becomes inoperative and you cannot file, receive refunds, or complete financial transactions requiring PAN.