02 August 2025
It looks like the site [www.tinxsys.com](http://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.