Answer
The TAN (Tax Deduction and Collection Account Number) is a 10-digit alphanumeric code issued by the Income Tax Department of India to entities responsible for deducting or collecting tax (TDS/TCS).
Format of TAN Number:AAAA99999A
First 4 characters (AAAA) → Letters (denoting jurisdiction code, e.g., DEL for Delhi, BLR for Bangalore, MUM for Mumbai).
Next 5 characters (99999) → Numbers(randomly assigned digits).
Last character (A) → 1 Letter(checksum for validation).
Example of a Valid TAN:
BLR56789F (where BLR = Bangalore jurisdiction)