The amount of TCS paid by the operator to the government will be reflected in the GSTR-2 of the actual registered supplier (on whose account such collection has been made) on the basis of the statement filed by the operator. The same can be used at the time of discharge of tax liability in respect of the supplies made by the actual supplier. (Refer to Section 52(7) of the CGST Act, 2017).
(FAQ 13: E-COMMERCE)