The law
Income-tax Act 2025, Sec 397(1)(a) (old Sec 203A, 1961 Act)
Every person deducting or collecting tax must apply for a TAN within the prescribed time unless already allotted oneSource
Income-tax Act 2025, Sec 397(1)(b)
TAN must be quoted in challans, statements, certificates and other prescribed documentsSource
Income-tax Act 2025, Sec 397(1)(c)
No TAN needed for deductions under Sec 393(1) Table Sl. 2(i), 3(i) and 6(ii), Sec 393(4) Table Sl. 12.C(a), and persons notified by the Central GovernmentSource
Income-tax Rules 2026, Rule 216 (old Rule 114A)
Government applies in Form 134, others in Form 135; apply before deducting, or within 30 days from the end of the month of deduction; attach proof of identity, address and date of birth or incorporationSource
Income-tax Act 2025, Sec 468 (old Sec 272BB)
Penalty of ₹10,000 for failure to comply with Sec 397, and ₹10,000 for quoting a TAN known to be falseSource
Government fee
₹77 inclusive of GST (Form 134/135 FAQs, https://www.incometaxindia.gov.in/documents/d/guest/form-134-135-faqs). Protean's instruction page states ₹77 plus GST as applicable (https://tin.tin.proteantech.in/tan/InstructionsTanRegistration.html); confirm the amount shown at payment.
Late fee or penalty
No late fee for a late TAN application. Penalty of ₹10,000 under Sec 468 of the Income-tax Act 2025 for failing to comply with Sec 397 (old Sec 272BB). Source: https://www.incometaxindia.gov.in/w/section-468-6