tin verification

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C.A Alok Mukherjee

C.A Alok Mukherjee (Querist)
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17 November 2009 Can anybody tell me the tin website if we want to check the cst registration no throgh net.

CA Chandra Kishore Bajpai

CA Chandra Kishore Bajpai (Expert)
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18 November 2009 Following website can help you,

"https://www.tinxsys.com/TinxsysInternetWeb/searchByCst_Inter.jsp"

www.tinxsys.com

C.A Alok Mukherjee

C.A Alok Mukherjee (Querist)
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18 November 2009 Dear Chnadra,

I have tried both. getting troubles i am finding the tin input screen is inactive.

Aashok Kumar Sharma

Aashok Kumar Sharma (Expert)
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02 August 2025 It looks like the site [www.tinxsys.com](https://www.tinxsys.com) you mentioned used to be the go-to for verifying TIN/CST numbers online, but sometimes these government or related portals face downtime or technical issues, which might be why the input screen is inactive for you.

### Here are some updated tips for TIN verification:

1. **Check State Commercial Tax Department Website**
Many states now provide online TIN verification on their official VAT or Commercial Tax websites.
Example:

* Maharashtra: [https://mahavat.gov.in](https://mahavat.gov.in)
* Karnataka: [https://ctax.kar.nic.in](https://ctax.kar.nic.in)
* Tamil Nadu: [https://www.tn.gov.in/tax](https://www.tn.gov.in/tax)

You can search by dealer name or TIN there.

2. **Use GST Portal (If GST Registered)**
Since GST has largely replaced VAT/CST, if the dealer is registered under GST, you can verify their GSTIN (which replaced TIN for interstate trade) on the GST portal:
[https://www.gst.gov.in/](https://www.gst.gov.in/)
Use the “Search Taxpayer” option to verify.

3. **Alternative websites/tools**
Some private portals attempt to maintain TIN/CST databases but be cautious of accuracy. Prefer official state portals.

4. **Offline Verification**
If online systems are down, you can request the dealer to provide a **copy of their VAT/CST registration certificate** or confirmation from the respective VAT department.

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