What documents do I need to fill ITR online?

Documents required to fill ITR online include Form 16 (for salaried), Form 26AS / AIS (Annual Information Statement), bank statements, investment proofs (80C, 80D), home loan interest certificate, capital gain statements from broker or mutual fund houses, and PAN and Aadhaar card details.

How to Fill ITR Online – Complete Income Tax Return Filing Guide India 2026

Confused about how to fill ITR online? Get expert-assisted income tax return filing for AY 2026-27 across Delhi, Mumbai, Bangalore, Hyderabad, Chennai, Pune, Kolkata and all of India. Simple, fast, and 100% online.

Call +91 9818209246 – File ITR Now

Filing income tax returns is a legal obligation for every eligible taxpayer in India. Many taxpayers still wonder how to fill ITR online without making costly errors. The Income Tax Department's e-filing portal has made it easier than ever. However, for self-employed individuals, business owners, and those with multiple income sources, professional guidance remains critical. SetupFiling.in is India's trusted online platform for hassle-free, expert-assisted income tax return filing.

Whether you are a salaried employee in Delhi, a freelancer in Mumbai, a business owner in Bangalore, or an NRI investor, understanding how to fill ITR online correctly can save you money, protect you from penalties, and ensure maximum refunds. Furthermore, late filing or incorrect filing can attract notices, penalties under Section 234F, and even loss of carry-forward of losses. Therefore, choosing the right approach to file your income tax return online is extremely important.

Quick Fact: The due date to file ITR online for AY 2026-27 (FY 2025-26) for individuals is 31st July 2026. File early to avoid late fees, interest, and last-minute errors.

How to Fill ITR Online – Step by Step Guide for AY 2026-27

The process of filling ITR online on the government's e-filing portal (incometax.gov.in) involves a clear sequence of steps. Additionally, taxpayers can use third-party platforms like SetupFiling for expert-guided online income tax return filing. Below is a complete step-by-step walkthrough:

Register or Login on e-Filing Portal

Visit incometax.gov.in. If you are a new user, register using your PAN. Existing users can log in with PAN as User ID and their password. Link your PAN with Aadhaar if not already done.

Select Assessment Year and ITR Form

Go to e-File > Income Tax Returns > File Income Tax Return. Select AY 2026-27 and Mode as 'Online'. Select the correct ITR form – ITR-1 for salaried, ITR-2 for capital gains, ITR-3 for business, and so on.

Validate Pre-Filled Data

The portal auto-populates data from Form 26AS, AIS, and TIS. Consequently, review and validate salary, TDS, interest income, and other entries. Correct any discrepancies before proceeding further.

Enter Income Details

Fill in salary income (from Form 16), house property income, capital gains (from broker/MF statements), business income, and other sources like interest, dividends, or rental income across Delhi, Mumbai, Hyderabad, or any other city.

Claim Deductions and Exemptions

Enter all eligible deductions under Section 80C (PPF, ELSS, LIC), 80D (health insurance), 80G (donations), HRA, home loan interest (Section 24), education loan, and so on. Maximising deductions reduces your taxable income significantly.

Choose Tax Regime

For AY 2026-27, choose between the Old Tax Regime (with deductions) and the New Tax Regime (lower slab rates, fewer deductions). Compare both and choose the one that results in lower tax liability for you.

Review Tax Computation and Pay Tax if Due

Check the tax computation summary. If any tax is due after TDS and advance tax, pay it online using Challan 280 before submitting the return. If a refund is due, verify your pre-validated bank account for direct credit.

Submit and e-Verify

Preview the complete return, submit it, and e-Verify using Aadhaar OTP, Net Banking EVC, Bank ATM EVC, or DSC. E-verification must be completed within 30 days. The ITR process is complete only after successful verification.

Our Income Tax Return Filing Services Online

setupfiling.in provides comprehensive online income tax return filing services for individuals, businesses, freelancers, NRIs, and corporates across India. Moreover, our expert team ensures you claim every eligible deduction and file a completely accurate return without any hassle.

ITR Filing for Salaried Individuals

Salaried employees from Delhi NCR, Mumbai, Bangalore, Chennai, and across India can file income tax return for individuals quickly. We handle Form 16 analysis, HRA exemption calculation, standard deduction, and Section 80C claims. As a result, you get maximum refunds with zero errors. Our experts ensure your return is filed well before the due date.

Similarly, employees in Ghaziabad, Noida, Pune, Kolkata, and Ahmedabad trust SetupFiling for their annual income tax e-filing. Call +91 9818209246 to file today.

ITR-2 Filing – Capital Gains & Multiple Properties

If you have sold shares, mutual funds, property, or hold more than one house property, you must file ITR-2 online. Our tax experts calculate short-term and long-term capital gains accurately, apply indexation benefits, and ensure correct tax computation. Furthermore, we handle DTAA relief for NRIs and foreign income disclosure.

Taxpayers in Mumbai, Hyderabad, Bangalore, Kolkata, and Delhi NCR regularly use our ITR-2 filing service. Contact us at help@setupfiling.in for expert assistance.

Income Tax E-Filing for Business Owners

Business owners, sole proprietors, and professionals need to file ITR-3 or ITR-4 with accurate books of accounts. SetupFiling assists with income tax return filing for sole proprietorship businesses, partnerships, and freelancers across India. Consequently, we ensure correct profit calculation, eligible business expense deductions, and presumptive taxation under Section 44AD/44ADA.

Business owners from Surat, Ludhiana, Jaipur, Coimbatore, Nagpur, and Indore have benefited from our expert income tax filing services.

Income Tax E-Filing – ITR Filing for NGO / Trust

Trusts, Section 8 Companies, and NGOs registered under 12A and 80G must file Income Tax Returns annually. SetupFiling provides income tax return filing for NGOs across India. Additionally, we assist with maintaining tax-exempt status, filing Form 10B (audit report), and disclosing donations and grants accurately in the return.

NGOs operating in Delhi, Hyderabad, Lucknow, Bhopal, and other cities trust SetupFiling for compliance.

Income Tax Refund Claim

Excess TDS deducted by employers, banks, or clients can be reclaimed by filing an ITR and claiming a refund. SetupFiling helps with income tax refund claims for individuals and businesses. We verify Form 26AS, reconcile TDS credits, and ensure the refund is credited directly to your bank account. Likewise, we assist in responding to refund reissue requests.

Taxpayers from Pune, Chennai, Ahmedabad, Chandigarh, and Jaipur have successfully claimed refunds through SetupFiling.

Advance Tax Payment Assistance

If your estimated tax liability exceeds ₹10,000 in a year, you must pay advance tax in four instalments (June, September, December, March). Failure to pay leads to interest under Sections 234B and 234C. SetupFiling helps you estimate your advance tax, compute instalments correctly, and pay on time through the e-filing portal.

Furthermore, our experts assist freelancers, consultants, and business owners across India in advance tax planning.

Income Tax Audit

Businesses with turnover above the prescribed threshold must get their accounts audited under Section 44AB. SetupFiling arranges income tax audit services by qualified Chartered Accountants for businesses across India. Consequently, the audit report is filed on time and attached with the ITR to ensure complete compliance.

Manufacturing units, traders, and service providers from Ludhiana, Surat, Kolkata, and Mumbai use our audit services.

Documents Required to Fill ITR Online in India

Before you begin filling your income tax return online, keep these key documents ready. Having these on hand ensures smooth and accurate online income tax filing without interruptions.

For salaried individuals, Form 16 (issued by employer) is the most important document. It contains salary breakup, TDS deducted, and HRA and other exemption details. Additionally, Form 26AS and the Annual Information Statement (AIS) available on the e-filing portal show all TDS credits, advance tax paid, and other financial transactions reported to the income tax department.

Bank statements are required to report interest income from savings accounts, fixed deposits, and recurring deposits. Furthermore, investment proofs for 80C (LIC, PPF, ELSS, NSC), 80D (medical insurance premium), and 80G (charitable donations) are needed to claim deductions. For those with capital gains, a capital gain statement from stockbrokers (for shares) or mutual fund account statements (for mutual funds) is essential. Similarly, home loan interest certificates from banks are needed to claim deduction under Section 24. Therefore, organising all documents beforehand speeds up the ITR filing process significantly.

Why Choose SetupFiling for Income Tax Return Online Filing?

SetupFiling.in is a trusted, India-based legal and compliance platform headquartered at 775, Sector 5, Vaishali, Ghaziabad, Delhi NCR 201010. We have helped thousands of taxpayers – salaried individuals, freelancers, business owners, and NRIs – file their income tax returns online accurately and on time. Moreover, our team of experienced tax professionals ensures you claim every eligible deduction and receive maximum refunds.

Our process is completely online, paperless, and transparent. You simply share your documents via WhatsApp or email, our experts prepare your return, and you receive a detailed review before submission. As a result, there are no surprises, no hidden charges, and no last-minute errors. Furthermore, we stay up-to-date with all changes in the Income Tax Act, including the New Tax Regime updates for AY 2026-27, to give you the best possible advice.

In fact, SetupFiling also provides end-to-end support for GST Registration, GST return filing, trademark registration, private limited company registration, MSME registration, and many other business compliance services across India. Consequently, you get a one-stop solution for all your business and tax needs.

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100% Online Process

No physical visits required. Share documents digitally and get your ITR filed from anywhere in India.

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Expert Tax Professionals

Qualified CAs and tax experts review every return before filing. Maximum accuracy, zero errors.

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Maximum Refund Guaranteed

We identify every eligible deduction to ensure you receive the highest possible tax refund.

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On-Time Filing

We file your return well before the due date to avoid late fees, interest, and penalty notices.

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100% Secure & Confidential

Your financial data is protected with the highest security standards. No data sharing with third parties.

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Dedicated Support

Our team is available via phone, WhatsApp, and email for queries, notice responses, and follow-ups.

Locations We Serve – How to Fill ITR Online Across India

SetupFiling provides online income tax return filing services to taxpayers in every corner of India. Whether you are in a metro city, a Tier-2 city, or a smaller town, our 100% online process means geography is never a barrier. Below are some key locations where we actively serve clients:

ITR Filing Online in Delhi NCR – Ghaziabad, Noida, Gurugram, Faridabad

As our headquarters is at 775, Sector 5, Vaishali, Ghaziabad, Delhi NCR, we have a strong presence in the Delhi NCR region. Salaried professionals in Noida, Gurugram, and Faridabad, as well as business owners in Delhi, can easily file income tax return online with our expert team. Moreover, taxpayers in the Delhi NCR region benefit from same-day ITR preparation for simple cases. Additionally, we assist with GST registration in Delhi, GST registration in Delhi, and company formation services.

How to Fill ITR Online in Mumbai, Pune, and Maharashtra

Maharashtra is home to some of India's largest taxpayer bases. From corporate professionals in Mumbai's business districts to IT professionals in Pune, and MSME owners in Nagpur and Aurangabad – SetupFiling provides online income tax return filing for all profiles. Furthermore, we offer GST registration in Mumbai and trademark services across Maharashtra. Clients in Thane, Nashik, Solapur, and Amravati also avail our income tax filing services.

Income Tax Return Online Filing in Bangalore and Karnataka

Bangalore's IT sector generates a significant portion of India's salaried taxpayers. Consequently, demand for how to fill ITR online is extremely high in the city. SetupFiling helps IT professionals, startup founders, and business owners in Bangalore, Mysore, Hubli, and Mangalore file income tax e-filing accurately. Additionally, we assist with GST registration in Karnataka and trademark registration for businesses.

ITR Filing Online in Hyderabad and Telangana

Hyderabad's rapid growth as a tech and pharmaceutical hub has created a large taxpayer community. SetupFiling provides expert e-filing income tax return services for IT professionals, pharmaceutical industry employees, and business owners in Hyderabad, Secunderabad, Warangal, Karimnagar, and across Telangana. Similarly, we offer GST registration in Telangana, shop and establishment registration, and professional tax registration.

How to File ITR Online in Chennai and Tamil Nadu

Tamil Nadu's diverse economy – from automobile manufacturing to IT services – means taxpayers have complex income sources. SetupFiling helps individuals and businesses in Chennai, Coimbatore, Madurai, Salem, Tirunelveli, and across Tamil Nadu with online income tax return filing. Moreover, we handle capital gains from stock markets, rental income from properties, and business income for accurate ITR filing. We also provide GST registration in Tamil Nadu.

ITR Filing Online in Kolkata and West Bengal

Kolkata's trading community, service sector professionals, and manufacturing businesses all require timely ITR filing. SetupFiling provides income tax India online ITR filing for individuals and businesses in Kolkata, Howrah, Durgapur, Asansol, and all districts of West Bengal. In fact, our clients include traders, professionals, NGOs, and startup founders from across the state.

Online Income Tax Filing in Gujarat – Ahmedabad, Surat, Vadodara

Gujarat's thriving business community requires expert ITR filing assistance. SetupFiling helps business owners and professionals in Ahmedabad, Surat, Vadodara, Rajkot, Bhavnagar, and Junagadh with how to file income tax return online. Additionally, we provide GST registration in Gujarat, IEC code registration, and sole proprietorship registration for businesses across the state.

How to Fill ITR Online in Rajasthan, UP, Haryana, and MP

Salaried employees, government servants, and business owners in Jaipur, Lucknow, Kanpur, Chandigarh, Faridabad, Bhopal, and Indore regularly seek guidance on how to fill ITR online. SetupFiling provides expert assistance for income tax return filing for AY 2026-27 across Uttar Pradesh, Rajasthan, Haryana, and Madhya Pradesh. Furthermore, we assist with GST registration in Uttar Pradesh and GST registration in Haryana for business clients.

Explore Related Income Tax and Compliance Services

SetupFiling provides a complete range of tax, compliance, and business registration services across India. Additionally, you can explore the following related services to meet all your financial and legal compliance needs:

Frequently Asked Questions – How to Fill ITR Online in India

Here are the most searched questions about how to fill ITR online in India, answered clearly for taxpayers across Delhi, Mumbai, Bangalore, Hyderabad, Chennai, and all of India:

1. How to fill ITR online in India – step by step? ▼

To fill ITR online in India, visit the Income Tax e-filing portal (incometax.gov.in) and log in using your PAN and password. Select e-File > Income Tax Returns > File Income Tax Return. Choose AY 2026-27 and the correct ITR form (ITR-1, ITR-2, etc.). Validate the pre-filled data, enter income from all sources, claim eligible deductions, compute tax, pay any dues, preview the return, submit it, and e-verify using Aadhaar OTP, EVC, or DSC. Alternatively, you can hire SetupFiling for expert-assisted online ITR filing. Call +91 9818209246 for immediate help.

2. What is the last date to fill ITR online for AY 2026-27? ▼

The last date to file ITR online for Assessment Year 2026-27 (Financial Year 2025-26) is generally 31st July 2026 for individuals, HUFs, and non-audit cases. For businesses and professionals requiring tax audit, the due date is 31st October 2026. Filing after the due date attracts a late fee of up to ₹5,000 under Section 234F and also leads to loss of certain carry-forward benefits.

3. Which ITR form should I fill online for salaried income? ▼

Salaried individuals with total income up to ₹50 lakh, one house property, and interest income should file ITR-1 (Sahaj) online. If you have capital gains from shares or property, more than one house, or foreign income, you must file ITR-2. Business owners should file ITR-3 or ITR-4 depending on the nature of income. SetupFiling helps you identify the correct ITR form based on your income profile and file it error-free.

4. What documents are needed to fill ITR online? ▼

Key documents required to fill ITR online include: Form 16 (from employer), Form 26AS and Annual Information Statement (AIS) from the e-filing portal, bank account statements, investment proofs for deductions under Section 80C, 80D, 80G, home loan interest certificate, capital gain statements from brokers or mutual fund companies, rental income details, and PAN + Aadhaar card. For business owners, profit and loss accounts and balance sheets are also required.

5. Can I fill ITR online for free in India? ▼

Yes, you can fill ITR online for free using the government portal incometax.gov.in. However, many taxpayers prefer professional assistance to ensure accuracy, maximise deductions, and avoid rejection notices. SetupFiling.in offers affordable, expert-assisted ITR filing for salaried individuals, business owners, freelancers, and NRIs across India. Our transparent pricing ensures you know exactly what you are paying for. Contact us at help@setupfiling.in or call +91 9818209246 for a free consultation.

File Your Income Tax Return Online Today – Expert Assistance Across India

Don't wait till the last minute. Let SetupFiling's expert team handle your ITR filing for AY 2026-27 accurately, quickly, and at an affordable cost. We serve Delhi, Mumbai, Bangalore, Hyderabad, Chennai, Pune, Kolkata, Ahmedabad, Surat, and all of India.