Income tax Golamber, Patna -1.

1. Kishanganj (Bihar) Extension office
Halimchowk, Kishanganj-855107 Bihar

2. Darbhanga (Bihar) extension office
Gangasagar west, near marwari college Darbhanga- 846004

3. Kolkata Extension office 
21D Canning street, 3rd floor Kolkata-1

4. Delhi extension office
S-621, gali no. 2, Nehru enclave, shakarpur Delhi-92

5. Kashmiri Gate Delhi 110006

6. Tripura Extension office
Near paikhola, south tripura-25

7. Jharkhand (Latehar Extension office)
Maharaja palace, station road chatnahi, latehar-06

8. KatiharExtension office

Hridayganj near petrol pump, Post Katihar Court.

PS sahayak, Dist Katihar, Pin.854105