where does a defence family pensioner file her income tax return in the city of kolkata?

Question

this is regarding my mother's tax return to be filed for the first time since the passing away of my father - a retired army officer.

Answer 1

See in calcutta the jurisdiction is according to pincode where your stays. So if you want to know which office your mother is supposed to file the return, visit Aaykar Bhawan at Dharmatalla and ask the PRO about the jurisdiction.
If you tell the PINCODE, I can also help.