Why was ₹13.5 debited when I sold one share?
Depository Participant (DP) charges ₹13.5 (CDSL) or ₹14 (NSDL) per ISIN per day on debit (sell) side. Flat fee irrespective of quantity. Example: sell 1 or 1 000 shares of TATASTEEL same day → only ₹13.5. Some brokers cap at ₹20 per day.