Tax Deduction and Collection Account Number (TAN) is a 10-digit alphanumeric number. The number is required to be quoted on all TDS returns under Section 203A of the Income Tax Act, 1961. The TAN number is needed to be obtained by all those persons who are responsible for deducting and collecting taxes.

Structure of 10 digit TAN -

TAN structure is as follows: RAJA99999B:
The first four characters are letters; the next five are numerals; the last character is a letter.
The first three characters represent the city or state where the TAN was issued.
The fourth character represents the first character of the name of the deductor.
The next five characters are numerical.
And the Last character is a letter.
TAN helps to identify each tax deductor uniquely.