I faced the same situation a few months back bro. In my case I Filed the TDR as soon as receiving the delay SMS. At first the dimers warned me that the TTE would sell the ticket but anyhow I filed it. After three months I got the full refund. I haven't got any no travel certificate from the station master. Go ahead and file you will get the refund.
After 3 hours of late departure from your reservation station only you are eligible for Full Refund.
So you need to wait till it reach your Boarding or reservation station
It will not allow you to file the TDR until it shows that the train is 3 hours late.
Even if you file the TDR, do no expect any refund. As TTE will sell your seat to someone else and will mark you as traveled.
If you really want a refund, go to the Railway Station, get the No Travel Certificate from the Station Master, and then file the TDR.
So, in case they reject your TDR case stating the reason you traveled, you can send this letter as a proof. (Process takes around 2-3 months)
It will not allow you to file the TDR until it shows that the train is 3 hours late.
Even if you file the TDR, do no expect any refund. As TTE will sell your seat to someone else and will mark you as traveled.
If you really want a refund, go to the Railway Station, get the No Travel Certificate from the Station Master, and then file the TDR.
So, in case they reject your TDR case stating the reason you traveled, you can send this letter as a proof. (Process takes around 2-3 months)