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31 OCTForm 24Q / 26Q · TDS return · Jul–Sep 2026in 11 days 7 NOVTDS / TCS deposit · Deducted in Oct 2026in 18 days 15 JANForm 27EQ · TCS return · Oct–Dec 2026in 87 days 15 JUNForm 16 · Salary TDS certificate · FY 2026-27in 238 days 20 OCTGSTR-3B · Summary return · Sep 2026due today 21 OCTTax Audit Report · Form 3CA/3CB · AY 2026-27 · extended from 30 Septomorrow 30 OCTAOC-4 · Financial statements · FY 2025-26in 10 days 11 NOVGSTR-1 · Outward supplies · Oct 2026in 22 days
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TAN AO Code Search

Find the Assessing Officer (AO) code for your city — required for TAN (Tax Deduction Account Number) applications (Form 49B).

AO Code = Area Code + AO Type + Range Code + AO Number. Enter these 4 values in the AO Code section of your TAN application form.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
AO Codes for KOLKATA  (19 records)
Ward / Circle / Range Area Code AO Type Range Code AO No. Copy
TDS CIRCLE 1 , KOLKATA
NUMERALS & NAMES [STARTING WITH A-H] AND ALL WB GOVT. OFFICES & LOCAL BODIES AND ALL OFFICES UNDER CENTRAL GOVT. AND RETURN INCOME > 50 LACS
 WBG CT 161 1
TDS CIRCLE 1(2) , KOLKATA
 WBG CT 161 2
TDS CIRCLE 2, KOLKATA
NAMES [STARTING WITH I TO P] AND RETURN INCOME > 50 LACS
 WBG CT 162 1
TDS CIRCLE 2(2), KOLKATA
 WBG CT 162 2
TDS CIRCLE 3, KOLKATA
NAMES [STARTS WITH Q TO Z] AND ALL EDUCATION INSTITUTIONS AND TCS CASES AND RETURN INCOME > 50 LACS
 WBG CT 163 1
TDS CIRCLE 3(2), KOLKATA
 WBG CT 163 2
TDS WARD 1(2), KOLKATA
NAMES [STARTING WITH B] AND RETURN INCOME < = 50 LACS
 WBG WT 161 2
TDS WARD 1(3), KOLKATA
NAMES [STARTING WITH C-G] AND RETURN INCOME <= 50 LACS
 WBG WT 161 3
TDS WARD 1(1), KOLKATA
NAMES [STARTING WITH H] AND RETURN INCOME <= 50 LACS
 WBG WT 161 4
TDS WARD 1(6), KOLKATA
 WBG WT 161 6
TDS WARD 1(7), KOLKATA
 WBG WT 161 7
TDS WARD 1(5), KOLKATA
 WBG WT 161 9
TDS WARD 2(1), KOLKATA
NAMES [STARTING WITH I] AND RETURN INCOME < = 50 LACS AND ALL OFFICES UNDER CENT.GOVT.
 WBG WT 162 1
TDS WARD 2(2), KOLKATA
NAMES [STARTING WITH J TO K] AND RETURN INCOME <= 50 LACS
 WBG WT 162 2
TDS WARD 2(3), KOLKATA
NAMES [N TO P] AND RETURN INCOME = 50 LACS
 WBG WT 162 4
TDS WARD 3(1), KOLKATA
NAMES [STARTS WITH Q TO R] AND RETURN INCOME <= 50 LACS
 WBG WT 163 1
TDS WARD 3(2), KOLKATA
SCHOOL, COLLEGE, UNIVERSITY, EDUCATIONAL INSTITUTIONS [STARTS WITH SP TO SZ], TCS CASES
 WBG WT 163 2
TDS WARD 3(3), KOLKATA
NAMES[STARTS WITH SA TO SO] AND RETURN INCOME <= 50 LACS
 WBG WT 163 3
ITO,TDS,INT TAX-I
 DLC WT 511 1
Good to Know

About TAN AO Code

TAN AO Code is a 4-part code required in the TAN application form (Form 49B). It identifies the Income Tax office (Assessing Officer) that will handle your TDS/TCS returns. The code consists of: Area Code (3 letters), AO Type (2 letters), Range Code (number), and AO Number (number).
Search your city above, identify the Ward/Circle that matches your business jurisdiction, and note the 4 components. Enter these in the respective fields of your TAN application on the NSDL portal.
If you know your TDS Ward/Circle/Range from previous filings, select that exact entry. If you're new — select the row that covers your district's TDS deductions or contact your nearest Income Tax office.
TAN AO Code is for Tax Deduction Account Number applications — used by entities deducting TDS. PAN AO Code is for PAN applications — used by individuals and businesses for their personal/business tax assessment.
Yes, the Income Tax department reorganises jurisdictions periodically. Data here is sourced from NSDL's official portal. When in doubt, verify with your local Income Tax office.
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