14 August 2010
PAN is Permanent Account Number ie account number of the assessee in the Income Tax department and every assessee should have only one PAN.
TAN is the Tax-Deduction Account Number i.e. the account number alloted by Income Tax dept. to the assessee who has right to duduct tax at source on income(TDS) or collect at source (TCS).
TIN-The Tax Payer’s Identification Number (TIN) is new unique registration number that is used for identification of dealers registered under VAT. It consists of 11 digit numerals and will be unique throughout the country. First two characters will represent the State Code as used by the Union Ministry of Home Affairs. The set-up of the next nine characters may, however, be different in different States.