How to Check Tax Credit Mismatch Online: Step-by-Step Resolution Guide

August 24, 2026

A tax credit mismatch occurs when the tax credit amount you claim in your filed Income Tax Return (ITR) does not match the actual tax credit records available in the Income Tax Department’s database. This database is primarily reflected in your Form 26AS or Annual Information Statement (AIS). If you are facing a delayed refund or have received a tax demand notice, learning how to check tax credit mismatch online is the first step toward resolving the issue.

Leaving a tax credit mismatch unresolved can lead to serious consequences, such as blocked or delayed tax refunds, a reduction in your claimed refund amount, or an official tax demand notice under Section 143(1) of the Income Tax Act. Fortunately, the Income Tax Department provides a dedicated, completely free-of-cost online utility on its e-filing portal to help taxpayers view, compare, and resolve these discrepancies quickly.

Understanding Tax Credit Mismatch and Its Causes

The Income Tax Department strictly limits the tax credit granted to a taxpayer to the exact amount reflected in Form 26AS. Even if you possess physical tax certificates, such as Form 16 or Form 16A, the department will not grant credit for any amount that does not appear in their digital database. The primary types of tax credits involved in these calculations include Tax Deducted at Source (TDS), Tax Collected at Source (TCS), Advance Tax (AT), Self-Assessment Tax (SAT), and Regular Assessment Tax.

Primary Causes of Tax Credit Mismatches

Discrepancies between your ITR claims and the department’s records usually stem from specific errors made by either the tax deductor or the taxpayer. The most common causes include:

Deductor Failures: The employer, bank, or deductor may have failed to file their quarterly TDS/TCS returns, filed them late, or entered an incorrect Permanent Account Number (PAN) or tax amount.
Taxpayer Entry Errors: Typographical mistakes made by the taxpayer when filling out the ITR, such as entering incorrect TDS schedules, wrong Challan Serial Numbers, or incorrect BSR codes.
Incorrect Financial Year Selection: Depositing Self-Assessment Tax or Advance Tax under the wrong Assessment Year (AY) during challan payment.
Timing Lag: A temporary mismatch can occur due to a timing lag. For instance, tax deducted in late March might only reflect in Form 26AS after the deductor files their quarterly return in May or June.

Note on Terminology: While some financial platforms may refer to proposed renamed forms (such as Form 168, Form 130, or Form 102) for future financial years, the official Income Tax Department e-filing portal manuals and FAQs (as of August 2026) continue to explicitly use the terms “Form 26AS”, “Form 16”, and “Tax Credit Mismatch”. This guide strictly adheres to the official portal terminology.

Prerequisites and Documents Required to Check Mismatch

Before you begin the online verification process, you must ensure you meet the eligibility criteria and have the necessary documents ready.

You must be a registered user on the official Income Tax e-filing portal with a valid User ID and password.
You must possess a valid and active Permanent Account Number (PAN).
At least one Income Tax Return (ITR) must have been filed for the relevant Assessment Year (AY) you wish to check.
The TDS, TCS, or tax paid must be reflected in Form 26AS on the e-filing portal.
For E-Return Intermediaries (ERIs): The ERI must be added, the ERI must have registered the taxpayer as their active client, and the status of the ERI must be active.

Essential Documents for Verification

To cross-verify and reconcile the mismatch, keep the following documents and details handy:

Income Tax e-Filing Portal Credentials: Your PAN/Aadhaar and password.
Form 26AS & AIS/TIS: Your Tax Credit Statement generated via TRACES, along with your Annual Information Statement (AIS) and Taxpayer Information Summary (TIS).
Copy of the Filed ITR: The ITR filed for the relevant Assessment Year, specifically the schedules containing details of tax payments, TDS, and TCS.
Supporting Certificates: Form 16 (for salaried individuals) or Form 16A (for non-salary TDS) to identify where typographical or data-entry errors occurred.
Challan Counterfoils or Receipts: Receipts for Advance Tax or Self-Assessment tax payments to verify BSR codes, challan serial numbers, and dates of deposit.

Step-by-Step Guide to Check Tax Credit Mismatch Online

The Income Tax Department provides a dedicated online utility that allows taxpayers to compare their claimed tax credits against the department’s records. Checking this mismatch is completely free of cost and provides immediate feedback.

Phase 1: How to Check the Tax Credit Mismatch Online

Follow these steps to view and download your tax credit mismatch details:

Visit Portal: Go to the official Income Tax Department e-Filing portal at https://www.incometax.gov.in.
Log In: Click on the ‘Login’ button and enter your valid user credentials (your PAN or Aadhaar as the User ID, followed by your Password).
Navigate to Service: Once on your personalized Dashboard, hover over or click on the ‘Services’ menu and select ‘Tax Credit Mismatch’ from the dropdown list.
Select Details: On the Tax Credit Mismatch page, your PAN will be pre-filled. Select the relevant Assessment Year (AY) for which you want to check the discrepancy.
Submit: Click the ‘Submit’ button.
Interpret the Results:
- If there is no mismatch, the portal will display: ‘Tax Credit Claimed is Fully Matched with Tax Credit Available in 26AS’.
- If there is a mismatch, the system will display: ‘There is a mismatch’ and list the line-by-line comparison details.
Download Records: If the list contains more than 10 mismatch records, click the ‘Download’ button to save the statement in PDF or Excel (XLS) format for offline reconciliation.

Phase 2: How to View and Download Form 26AS to Cross-Verify

To perform a detailed comparison, you should download your Form 26AS directly from the TRACES portal using the single sign-on integration:

Log in to the Income Tax e-Filing portal.
Go to the e-File menu, select Income Tax Returns, and click on View Form 26AS (Tax Credit).
Click Confirm on the disclaimer popup to be securely redirected to the TDS-CPC (TRACES) portal.
Agree to the usage terms on the TRACES portal and click Proceed.
Click on the link View Tax Credit (Form 26AS).
Select the relevant Assessment Year and choose your preferred view format (HTML or Text).
Click View / Download. To save a PDF copy on your device, select the HTML view and then click Export as PDF.

How to Resolve a Tax Credit Mismatch Online

Once you have identified the mismatch, you must resolve it to clear any pending refunds or tax demands. The resolution pathway depends entirely on whether you have received an official Intimation under Section 143(1). Filing a revised return or a rectification request on the e-filing portal is completely free of cost.

If Intimation u/s 143(1) is NOT received: You can file a Revised Return under Section 139(5) to correct any typographical or data-entry errors in your tax schedules.
If Intimation u/s 143(1) is received: You must file an online Rectification Request under Section 154, specifically selecting the “Tax Credit Mismatch Correction” option.

Phase 3: How to Raise an Online Rectification Request (Section 154)

If you have received an official intimation and need to correct errors in your tax credit schedules, follow these steps:

Log in to the e-filing portal (incometax.gov.in).
Go to the Services menu and click on Rectification.
Click on the + New Request button.
Select the taxpayer type or category (Income Tax or Wealth Tax), select the relevant Assessment Year from the dropdown, and click Continue.
Under the Request Type, select Tax Credit Mismatch Correction from the available options.
The system will automatically load the relevant schedules (TDS, TCS, Advance Tax, Self-Assessment Tax).
Edit and Correct Details: Correct the inaccurate schedules by re-entering the correct Challan Serial Number, BSR code, date of deposit, or deductor TAN and amount. Note: Do not add any new income or new deductions during this process.
Submit & Verify: Review the pre-filled schedules, save your changes, and submit the rectification request. Verify the submission using Aadhaar OTP, Electronic Verification Code (EVC), or a Digital Signature Certificate (DSC).
Track Status: Monitor the progress of your request by navigating to Services > Rectification Request > Rectification Status (or view under the ‘My Requests’ tab).

What to Do in Case of Deductor Errors

Taxpayers cannot directly edit or force-update Form 26AS records. If the mismatch is due to an error by the deductor (such as an incorrect PAN, wrong amount reported, or failure to file the TDS return), you must contact the deductor immediately. Request them to file a revised TDS/TCS return using the appropriate forms (such as Form 24Q or Form 26Q). Once the deductor files the correction, Form 26AS will update automatically, allowing you to proceed with your claim.

Important Rules, Restrictions, and Legal Provisions

Understanding the legal framework governing tax credits will help you avoid common mistakes during the reconciliation process:

Rule 37BA & Section 199: Under the Income Tax Rules, Form 26AS is the legally authoritative document for claiming tax credits. Even if you hold physical tax certificates like Form 16 or Form 16A, the Income Tax Department will only credit tax amounts that match the records in Form 26AS.
No New Claims in Rectification: You cannot claim any new deductions or declare new sources of income while submitting a “Tax Credit Mismatch” rectification request. The rectification process is strictly for correcting errors apparent from the record.
Rectification Limit: An online Rectification Request can only be raised if an Intimation under Section 143(1) or a subsequent order has been officially issued by the Central Processing Centre (CPC). If no intimation has been received, you must file a Revised Return instead.
Correct Challan Details: When paying Self-Assessment Tax or Advance Tax, any minor error in entering your PAN, Challan Number, or BSR Code will cause the payment to fail to reflect in Form 26AS, triggering a mismatch. Always double-check these details before submitting payments.

Frequently Asked Questions

What is the difference between Form 26AS and AIS?

Form 26AS focuses strictly on tax credits (TDS, TCS, Advance Tax, and Self-Assessment Tax) mapped to your PAN. The Annual Information Statement (AIS) is a comprehensive financial profile that includes all reported financial transactions, including interest, stock market transactions, mutual fund actions, and property transactions, regardless of whether tax was deducted.

What should I do if my TDS is not showing in Form 26AS?

You must contact your employer, bank, or deductor immediately. They must submit a revised TDS return correcting your PAN or adding your transaction. Once they file the correction, Form 26AS will update automatically.

When can I choose “Reprocess the Return” instead of “Tax Credit Mismatch Correction”?

You should select the “Reprocess the Return” option if your original ITR had correct details and Form 26AS was also completely updated before processing, but the CPC overlooked it during the initial processing. If you need to make manual corrections to the tax credit schedules, you must select “Tax Credit Mismatch Correction”.

Conclusion

Checking and resolving tax credit mismatches early is essential to prevent unnecessary tax demands and ensure smooth, hassle-free refund processing. By utilizing the official e-filing portal’s free “Tax Credit Mismatch” utility, you can easily identify discrepancies and take corrective action. Remember to keep your challans and certificates safe for quick cross-verification. While the exact processing time for a Rectification Request is variable and depends on the CPC’s workload, tracking your status online will keep you informed of its progress.