In general, the supplier of goods or services is liable to pay GST. However, in specified cases like imports and other notified supplies, the liability may be cast on the recipient under the reverse charge mechanism. Further, in some notified cases of intra-state supply of services, the liability to pay GST may be cast on e-commerce operators through which such services are supplied. Also Government Departments making payments to vendors above a specified limit [2.5 lakh under one contract as per S.51(1)(d)] are required to deduct tax (TDS) and E-commerce operators are required to collect tax (TCS) on the net value [i.e. aggregate value of taxable supplies of goods and/or services but excluding such value of services on which the operator is made liable to pay GST under Section 9(5) of the CGST Act, 2017] of supplies made through them and deposit it with the Government.