1. TAN has a unique number with lifetime validity.
2. TAN is ultimately used for deductions such as salary, interest, and dividends. While depositing a tax, the challan type 281 should be used and the 10 digit TAN number should be mentioned correctly along with the name and address of the deductor.
3. As TDS certificates are issued by a person or entity which holds TAN, the tax payee has an opportunity to know how much tax has been paid by him/her.
4. Similarly, the tax payee can use this TDS certificate as proof of tax paid in any type of grievances.