Tax Deduction and Collection Account Number" (TAN) registration is a unique identification number allotted to individuals or entities responsible for deducting or collecting taxes on behalf of the government. The registration process involves applying to the Income Tax Department of the country where the entity operates. TAN is mandatory for entities deducting tax at source (TDS) or collecting tax at source (TCS) and is used for various tax-related transactions, including filing TDS/TCS returns, depositing taxes, and issuing TDS/TCS certificates. It ensures transparency and accountability in tax collection and helps the government track tax deductions and collections efficiently. TAN registration is essential for businesses and individuals involved in financial transactions subject to TDS/TCS provisions