ITR Filing 2026 can feel straightforward until a small mistake holds up your income tax refund. You may have submitted the return, completed e-verification and even seen a refund amount on the screen, yet the money still does not reach your bank account. In many cases, the delay is not caused by a major tax problem. It starts with something ordinary: an unvalidated bank account, missing interest income, an incorrect ITR form or a mismatch in Form 26AS.
For income earned between 1 April 2025 and 31 March 2026, taxpayers will generally file their return under Assessment Year 2026–27. Before starting, visit the official Income Tax e-Filing portal and confirm the form, deadline and tax rules that apply to your situation.
A refund becomes due when the tax already paid through TDS, TCS, advance tax or self-assessment tax is higher than your final tax liability. However, the return must still be verified and processed before the refund can be credited.
Here are 15 common ITR filing mistakes that may delay your refund.
ITR Filing 2026 Mistake 1: Selecting the Wrong Assessment Year
The terms financial year and assessment year sound similar, so it is easy to mix them up.
The financial year is the period in which you earned the income. The assessment year is the following year, when that income is reported and assessed.
For example:
- Income earned during FY 2025–26
- Return filed under AY 2026–27
Selecting the wrong assessment year can lead to incorrect forms, mismatched tax details or confusion while tracking your return.
Before entering any income, check the assessment year displayed at the top of the filing page. For income earned between 1 April 2025 and 31 March 2026, the relevant selection is AY 2026–27.
You can review the available return forms on the official Income Tax Return page.
ITR Form Selection Mistake: Choosing ITR-1 Because It Looks Easier
https://www.qaskme.com/itr-filing-2026-10-mistakes-that-can-delay-your-tax-refund/
ITR-1 is relatively simple, but it is not suitable for every taxpayer.
The correct form depends on your sources of income and financial situation. Salary, pension, house property, capital gains, business income, foreign assets, directorships and ownership of unlisted shares can all affect which form you should use.
A salaried person with ordinary bank interest may have a simple return. However, someone with salary income and gains from selling mutual funds may need a different form.
Do not select ITR-1 only because it contains fewer sections. Using the wrong form may make the return defective or require you to file it again.
Before continuing with ITR Filing 2026, read the eligibility conditions for each form on the Income Tax Department website.
Income Tax Return Mistake: Depending Only on Form 16
Form 16 is useful, but it may not show your complete financial picture.
Your employer usually reports the salary paid and TDS deducted by that employer. Form 16 may not include:
- Savings-account interest
- Fixed-deposit interest
- Dividend income
- Freelance earnings
- Rental income
- Capital gains
- Salary from another employer
Suppose you earned ₹9 lakh from your job, ₹35,000 as fixed-deposit interest and ₹20,000 from occasional freelance work. Your Form 16 may show only the ₹9 lakh salary.
The other income does not become tax-free simply because it is missing from Form 16.
Before filing, review all the places from which you received money during the year. This one step can prevent an income mismatch later.
ITR Filing 2026 Mistake: Ignoring AIS and Form 26AS
The Annual Information Statement and Form 26AS should be reviewed before filing your return.
Form 26AS helps you check the tax credits reported against your PAN. AIS provides a wider picture of financial information reported by employers, banks and other institutions.
You may find:
- TDS from an old employer
- Interest from a forgotten fixed deposit
- Tax payments made during the year
- Securities or investment transactions
- A transaction that appears incorrect or duplicated
An unexpected entry does not automatically mean you did something wrong. Employers, banks and other reporting entities can also make mistakes. But ignoring the entry may cause problems during processing.
Compare your return with:
- Form 16 and Form 16A
- Form 26AS
- AIS and Taxpayer Information Summary
- Bank statements
- Interest certificates
- Investment statements
- Tax-payment challans
AIS can be accessed after signing in to the official Income Tax e-Filing portal.
TDS Mismatch Mistake: Claiming Tax Credit That Is Not Reflected
Sometimes tax is deducted from your salary, interest or professional payment, but the credit does not appear in Form 26AS.
For example, a client may have deducted ₹10,000 as TDS from your payment. The deduction appears on your payment advice, but the credit is missing from the tax records.
This may happen because:
- The deductor entered an incorrect PAN
- The TDS return was filed late
- The challan was reported incorrectly
- The deductor has not yet corrected the statement
Claiming a TDS amount that is not properly reflected against your PAN may create a mismatch and delay your refund.
Contact the employer, bank or client who deducted the tax and request a correction before submitting your return.
Income Tax Refund Delay: Forgetting Bank and FD Interest
Interest income is one of the easiest items to overlook during ITR Filing 2026.
You may have several savings accounts, an automatically renewed fixed deposit or a recurring deposit that you rarely check. The interest amounts may look small individually, but together they can make a noticeable difference.
Review interest earned from:
- Savings accounts
- Fixed deposits
- Recurring deposits
- Post-office deposits
- Bonds
- Previous income tax refunds
Download annual interest certificates from your banks wherever available. Compare them with AIS and your bank statements.
Also remember that the absence of TDS does not automatically make the interest exempt. TDS deduction and taxability are two different things.
Salary Income Mistake: Leaving Out a Previous Employer
Changing jobs during the year can create an unexpected tax calculation.
Your previous employer may have calculated TDS using only the salary paid by that company. Your new employer may also have calculated tax based only on the salary paid by the new organisation.
Both calculations can look correct separately. When the two salaries are combined, however, your final tax liability may increase.
This is why someone expecting a refund can suddenly discover that tax is still payable.
Collect Form 16 from every employer you worked for during FY 2025–26. Add the salary figures carefully and compare the TDS from each employer with Form 26AS.
Do not file using only the Form 16 issued by your latest employer.
Capital Gains Reporting Mistake: Ignoring Shares and Mutual Funds
Selling shares, mutual funds, bonds, property or other capital assets may create a taxable capital gain or a reportable capital loss.
Some taxpayers assume that reporting is unnecessary when:
- The profit was small
- The money was immediately reinvested
- No money was withdrawn from the trading account
- The investment platform already deducted some charges
These assumptions can lead to incorrect filing.
Broker tax reports are helpful, but they still need to be checked. Transferred holdings, corporate actions, missing purchase prices and investments bought through another broker can affect the final calculation.
Property transactions require even more attention because purchase cost, improvement expenses, holding period and eligible exemptions may change the taxable gain.
If your return includes complicated investment transactions, professional review may be worth the cost.
Tax Deduction Mistake: Copying Last Year’s Figures
Last year’s return can help you remember what documents to collect, but it should not be copied without checking.
Your circumstances may have changed. Perhaps you:
- Stopped paying rent
- Repaid your home loan
- Changed insurance plans
- Invested a different amount
- Switched tax regimes
- Became ineligible for a deduction
Keep supporting records for every deduction you claim, such as insurance receipts, home-loan certificates, tuition-fee receipts, investment statements, donation certificates and rent documents.
Your return should reflect what actually happened during FY 2025–26, not what was claimed in the previous year.
ITR Filing 2026 Mistake: Choosing the Wrong Tax Regime
There is no single tax regime that is better for everyone.
One person may pay less under the new tax regime because they have limited deductions. Another person with the same salary may benefit from the old regime due to eligible investments, rent, insurance or home-loan interest.
Do not select a regime only because:
- Your employer used it for TDS
- Your colleague chose it
- An online post called it the better option
- It appears to have lower tax rates
Calculate the tax under both regimes using your complete annual income and actual deductions.
Compare the final tax payable after considering rebate, cess, deductions and tax already paid. Looking only at taxable income may not give you the complete answer.
Personal Details Error: Entering Incorrect Information
Typing mistakes often occur in fields that appear easy.
Before submission, check:
- PAN
- Full legal name
- Date of birth
- Email address
- Mobile number
- Residential status
- Bank account number
- IFSC
Your name and date of birth should match the details linked to your PAN and e-Filing profile.
Residential status also deserves careful attention. It is determined under income-tax rules and not only by nationality or passport status.
A return can contain a correct tax calculation and still face processing issues because an important personal detail is wrong.
Tax Refund Bank Account Mistake: Using an Unvalidated Account
An approved refund may still fail if the bank details are incorrect.
Common problems include:
- Closed bank account
- Incorrect account number
- Wrong IFSC
- Name mismatch
- PAN not linked with the bank
- Account not nominated for refund
Log in to the e-Filing portal and open the My Bank Account section. Check whether the account is active, validated and nominated for refund.
The Income Tax Department explains the bank-account validation process in its official My Bank Account guide.
Complete the validation early instead of waiting until the day you file. A failed bank validation can delay the refund even when the return itself has been processed correctly.
Self-Assessment Tax Mistake: Assuming TDS Is Enough
TDS deducted during the year may not cover your complete tax liability.
Additional tax may arise due to:
- Fixed-deposit interest
- Capital gains
- Salary from multiple employers
- Freelance or consulting income
- Rental income
- Inadequate advance tax
Complete the full tax calculation before submitting the return.
If self-assessment tax is payable, make the payment and confirm that the challan information is correctly reflected in your return.
Otherwise, the return may result in a tax demand instead of the refund you expected.
ITR Verification Mistake: Filing Without E-Verifying
Uploading the return is not the final step in ITR Filing 2026.
The return must also be verified.
Verification may be completed through permitted methods such as:
- Aadhaar OTP
- Net banking
- Bank-account EVC
- Demat-account EVC
- Digital Signature Certificate
- Physical ITR-V submission
The official e-Verification guide explains the available methods.
The safest approach is to verify the return immediately after filing and save the acknowledgement. Delaying verification can prevent the return from moving forward for processing.
Income Tax Refund Tracking Mistake: Never Checking the Return Again
After filing and verification, continue checking the return status.
A refund may fail because of bank details. A mismatch may require a response. A communication may appear under Pending Actions, Worklist or e-Proceedings.
Do not rely only on email or SMS messages. Sign in to the official portal and check the status directly.
Be cautious with messages claiming that your refund is ready but asking you to click an unfamiliar link. Instead, type the official Income Tax portal address into your browser.
If a refund fails, the portal may allow you to submit a refund-reissue request using a validated bank account. You can review the official refund reissue guidance.
ITR Filing 2026 Checklist Before Submission
Before clicking the final submit button, take ten minutes to review the complete return.
Ask yourself:
- Have I selected AY 2026–27?
- Am I using the correct ITR form?
- Have I included salary from every employer?
- Did I report bank and FD interest?
- Have I checked AIS and Form 26AS?
- Are my TDS credits properly reflected?
- Did I report applicable capital gains?
- Are my deductions supported by documents?
- Have I compared both tax regimes?
- Is the refund bank account active and validated?
- Is any self-assessment tax still payable?
This final review may not guarantee an instant refund, but it can reduce mismatches, failed refund credits and unnecessary correspondence.
How to Avoid an ITR Refund Delay in 2026
Most refund delays are not caused by dramatic tax problems. They often begin with small, ordinary details: an old bank account, missing interest income, an incorrect tax credit or an unverified return.
For a smoother ITR Filing 2026 process:
- Collect all documents before starting.
- Compare your income with AIS and Form 26AS.
- Select the correct return form.
- Report every relevant income source.
- Use a validated bank account.
- Pay any remaining tax before filing.
- E-verify the return immediately.
- Monitor the status on the official portal.
Starting early gives you enough time to resolve TDS mismatches, collect missing statements and complete bank validation without rushing.
Final Thoughts on ITR Filing 2026
ITR Filing 2026 does not need to become a last-minute source of stress.
The safest approach is to gather your documents, report your complete income, check tax credits and review the return before submission. Once the return is filed, verify it promptly and continue monitoring its status.
If your income includes business activity, foreign assets, property sales, virtual digital assets or complicated capital gains, consider consulting a qualified tax professional. Guessing through a complex return can cost more than getting the right help at the beginning.
