Form 16b for my ex-serviceman (pensioner)

My dad is an ex-service man, who is now recieving pension from bank. He had invested his after retirement money in a FD in bank.

While it matured around 10k was deducted as TDS, now to get this back i must file ITR. For this I should be needing Form16B.

Who can provide me Form16B?? Should i approach the bank where my dad's pension is credited? I tried registering in TRACES and that has been a big pain. So looking for alternatives. Thanks in advance :)