No tds in 26as , then refund possible or not ???

IF NO TDS IN 26AS , THEN REFUND POSSIBLE ?? IS IT TRUE ????

Actually one of my client is a lic agent , as per form 16A his total tds for the a.y 2016-2017 rs 10120/=, but unfortunately due to wrong PAN no quoted in TDS qty return of LIC , as per 26AS his tds amount is NIL ( A.Y 2016-17 ) ,and i know it's quite impossible to get that refund amount .

But 2 yrs before as per Delhi high court order , i think it may be possible , but i m not sure about it that's why i m asking over here .

Is it possible to get that refund amount for a.y 2016-17 ??

or Can i make an appeal before an ITO with form 16A ??

Pls clarify with reasons ..

Regards.

Palash Raksh*t .