From 1st July 2020, a stamp duty of 0.005% gets deducted by authorities from the investment amount. After which, the remaining value gets utilised to purchase the fund units. For example, if you invest ₹1 lakh, the government applies a stamp duty of 0.005%. That's a stamp duty of ₹5 & it gets deducted automatically. So, the amount reflected in your order receipt as the investment cost would be ₹99,995.