How To Download Your CSI File
Step 1: Visit the TIN OLTAS website
![Screenshot of the TIN OLTAS homepage](/img/guide/csi-screen1.png)
- Go to https://tin.tin.nsdl.com/oltas/
- click on the TAN Based View Button
Step 2: Enter your TAN Details and download the CSI File
![Screenshot of the Challan Status Query form for downloading CSI File](/img/guide/csi-screen2.png)
- Fill-in your TAN Number
- Enter the appropriate start and end dates
- If everything is valid, you should be able to click on the Download Challan file button and successfully download the CSI file