TDS belongs to FY 16-17 credited to wrong PAN by employer

Revathi Lakshmi (Andhra pradesh) (47 Points)

01 September 2018  
Hi, my brother is a salaried employee, for fy 16-17,TDS deducted was Rs.8000 n he is eligible for refund but his form 26AS showing nill TDS, so we didn't file return for fy 17-18. we did so many follow-ups to employer, but no response..now he is saying like sorry that amount was credited to wrong PAN, we will rectify the mistake n will issue updated form 16 for 16-17 fy. Due date got over for filing return.is there any chance to get refund by filing return.

if yes,

pl suggest how to proceed.

Thanks in advance