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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.
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AO Codes for TRIVANDRUM  (2 records)
Ward / Circle / Range Area Code AO Type Range Code AO No. Copy
CIRCLE TDS, TRIVANDRUM
(I) Area lying within the territorial limits of the Revenue Districts of Thiruvananthapuram and Kollam (except Taluk of Karunagappally) and Adoor Taluk of Pathanamthitta District. All cases of persons who has deducted/collected tax at source of Rs.500000 or above other than cases assigned to other Income Tax Authorities being  (a) Persons other than Companies deriving income from sources other than income from business or profession and are residing within the territorial area mentioned in (I) above who have deducted/collected tax at source under Chapter XVII of the Income Tax Act, 1961 other than Sections 194E, 195, 196A, 196B, 196C and 196D (b) Persons other than Companies deriving income from business or profession and whose principle place of business is within the territorial area mentioned in in (I) above, who have deducted/collected tax at source under Chapter XVII of the Income Tax Act, 1961 other than Sections 194E, 195, 196A, 196B, 196C and 196D (c) Companies registered under the Companies Act having its registered office or principal place of business is within the territorial area mentioned in (I) above, who have deducted/collected tax at source under Chapter XVII of the Income Tax Act, 1961 other than Sections 194E, 195, 196A, 196B, 196C and 196D (d) Any other persons residing or having a place of activity within the territorial area mentioned in (I) above who is responsible for deducting/ collecting tax at source under Chapter XVII of the Income Tax Act, 1961 other than Sections 194E, 195, 196A, 196B, 196C and 196D.
KRL CT 64 1
WARD TDS, TRIVANDRUM
(I) Area lying within the territorial limits of the Revenue Districts of Thiruvananthapuram and Kollam (except Taluk of Karunagappally) and Adoor Taluk of Pathanamthitta District. All cases of persons who has deducted/collected tax at source of below Rs.500000 or who is responsible for deduction/collection of tax under items (a), (b), (c) & (d) below but failed to do so, other than cases assigned to other Income Tax Authorities being  (a) Persons other than Companies deriving income from sources other than income from business or profession and are residing within the territorial area mentioned in (I) above who have deducted/collected tax at source under Chapter XVII of the Income Tax Act, 1961 other than Sections 194E, 195, 196A, 196B, 196C and 196D (b) Persons other than Companies deriving income from business or profession and whose principle place of business is within the territorial area mentioned in in (I) above, who have deducted/collected tax at source under Chapter XVII of the Income Tax Act, 1961 other than Sections 194E, 195, 196A, 196B, 196C and 196D (c) Companies registered under the Companies Act having its registered office or principal place of business is within the territorial area mentioned in (I) above, who have deducted/collected tax at source under Chapter XVII of the Income Tax Act, 1961 other than Sections 194E, 195, 196A, 196B, 196C and 196D (d) Any other persons residing or having a place of activity within the territorial area mentioned in (I) above who is responsible for deducting/ collecting tax at source under Chapter XVII of the Income Tax Act, 1961 other than Sections 194E, 195, 196A, 196B, 196C and 196D.
KRL WT 64 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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