DSC for Income Tax Filing in India: Who Needs It and How to Get It (2026)
The Income Tax e-filing portal (incometax.gov.in) accepts multiple verification methods — but for companies and many audited individuals, a Digital Signature Certificate is not optional. This guide clarifies exactly who is mandated to use DSC, how to link it, and what to do when it doesn't work.
Who Is Mandated to Use DSC for Income Tax?
Not everyone needs a DSC to file income tax — the portal accepts EVC (Electronic Verification Code) via net banking, Aadhaar OTP, bank ATM, or demat account for most individuals. However, DSC is mandatory for the following:
| Taxpayer Category | DSC Required? | Alternative Allowed? |
|---|---|---|
| Private Limited Company | Yes (mandatory) | No |
| Public Limited Company | Yes (mandatory) | No |
| LLP (Limited Liability Partnership) | Yes (mandatory) | No |
| Political Parties | Yes (mandatory) | No |
| Individuals/HUFs with audit requirement (Sec 44AB) | Yes (mandatory) | No |
| Individuals/HUFs with income >₹5 crore | Yes (mandatory) | No |
| Individuals with Aadhaar-linked mobile | No | Aadhaar OTP accepted |
| Partnership Firms | Yes (mandatory) | No |
| Trusts filing returns | Yes (mandatory) | No |
| AOPs and BOIs | Yes (mandatory) | No |
Class 3 DSC: The Only Accepted Certificate
The Income Tax portal accepts only Class 3 Digital Signature Certificates. Following CCA's 2021 directive that phased out Class 2 certificates, only Class 3 is valid for all government portal transactions in India — including Income Tax.
For IT filing specifically, you need:
- Class 3 Individual DSC — if you are signing as a Director, Partner, Managing Trustee, or authorised signatory in your individual capacity.
- Class 3 Organisation DSC — if the certificate is issued in the company's name (required for some larger corporations' filings).
- The DSC must be valid on the date of filing — an expired certificate will be rejected outright.
- The DSC must match the PAN of the authorised signatory (usually the MD, Director, or designated partner).
DGFT DSC and Sign+Encrypt certificates are not typically used for IT filing — a standard Class 3 Sign certificate is sufficient and the most cost-effective option at ₹2,500 per year.
How to Link Your DSC on incometax.gov.in
Before using a DSC for IT e-filing, you must register it on the portal. Here is the step-by-step process:
- Install the eToken driver on your computer. If you got your DSC from Akham, the driver software was included with the token. Install it before proceeding.
- Plug in your USB token and enter your PIN to unlock it.
- Log in to incometax.gov.in using your PAN and password.
- Navigate to My Profile → Register DSC.
- The portal will prompt you to select your certificate. Your DSC (from the USB token) will appear in the certificate picker — select it.
- Enter your token PIN when prompted.
- The portal will verify the DSC and display a success confirmation. Your DSC is now linked to your PAN/profile.
You must repeat this registration step every time you renew your DSC or get a new certificate — the portal stores a reference to your specific certificate, not just your token.
Using DSC to Verify Your Income Tax Return
Once your DSC is registered, using it to verify your return is straightforward:
- Complete your ITR filing process on the portal (enter all income, deductions, tax details).
- On the verification step, select "Digital Signature Certificate (DSC)" as your verification method.
- Ensure your USB token is plugged in and unlocked.
- Click "Verify" — the portal will invoke the token, prompt for your PIN, and digitally sign the verification form.
- Upon successful signing, you'll see a confirmation and an acknowledgement (ITR-V) number. No physical ITR-V submission to CPC is needed — DSC-verified returns are instantly processed electronically.
Troubleshooting Common DSC Errors on the IT Portal
The Income Tax portal's DSC functionality is Java/browser-dependent and can sometimes be frustrating. Here are the most common errors and their fixes:
| Error | Likely Cause | Fix |
|---|---|---|
| "Certificate not found" or blank picker | eToken driver not installed or token not plugged in | Install driver, plug in token before opening portal |
| "Invalid certificate" or "Certificate expired" | DSC validity has expired | Renew your DSC before filing |
| "PAN mismatch on certificate" | DSC PAN doesn't match login PAN | Use DSC issued for the same PAN as your IT login |
| "Token PIN incorrect" | Wrong PIN entered — 5 failed attempts locks the token | Use correct PIN; contact CA if token is locked |
| Certificate picker doesn't load | Browser issue (Chrome, Firefox, Edge handle DSC differently) | Try Internet Explorer mode in Edge, or use the IT portal's offline ITD app |
| "DSC not registered" | Certificate renewed but not re-registered on portal | Go to My Profile → Register DSC and re-register |
If you're stuck on a portal error during a filing deadline, WhatsApp us — we provide remote troubleshooting support via screen share for Akham DSC clients.
What Happens If Your DSC Expires During Filing Season?
Income Tax filing deadlines are fixed — 31st July for individuals, 31st October for companies under audit, and 30th November for transfer pricing cases. If your DSC expires in June or October, you're in a high-risk window.
If your DSC expires before you file:
- The portal will reject your digital signature on the verification step — your ITR cannot be submitted.
- You will need to get a new DSC, register it on the portal, and then complete the verification.
- Even if you file the ITR data before expiry but try to verify after, verification will fail.
- Late filing for companies (ITR-6) attracts a fee under Section 234F — ₹5,000 for income over ₹5 lakh, ₹1,000 for income below ₹5 lakh.
This is why Akham sends renewal reminders 30 and 7 days before your expiry — so you are never caught in a deadline crunch with an expired certificate.
Need a DSC for Income Tax Filing?
Class 3 Individual and Organisation DSCs from ₹2,500. Same-day issuance. Documents via WhatsApp.
Get Your DSC on WhatsApp