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Country guide

Trinidad and Tobago

Trinidad and Tobago uses the Board of Inland Revenue file number as the domestic tax identifier for registered taxpayers. The same 10-digit BIR file number structure is used for individuals and entities; taxpayer category and tax type are tracked outside the visible number.

TT TTO 1 TIN type Last reviewed 2026-06-05

TIN types

1 published format. Open a type to see examples, structure details, and official sources.

Validate TTO TIN
Trinidad and Tobago Board of Inland Revenue File Number
Current Individuals Entities

Board of Inland Revenue (BIR), Inland Revenue Division, Ministry of Finance

Permanent tax file number assigned by the Board of Inland Revenue to a registered taxpayer and used for tax returns, payments, filings, and correspondence with the tax authority.

Details
Examples
1234567890 9876543210
Where to find it

On BIR correspondence and e-Tax documents such as an Advice of Assignment of BIR Number and Account Numbers, official receipts, statements of account, Notices of Assessment, tax clearance letters, and audit statements.

Common names
BIR Number BIR File Number Board of Inland Revenue File Number BIR# Individual Income Tax File Number Company File Number
Structure
1-10 BIR file number Ten-digit identifier generated by the Board of Inland Revenue; taxpayer category and tax type are tracked separately.
Official source
ird.gov.tt oecd.org finance.gov.tt