Typically, the supplier of goods or service is liable to pay GST. In certain cases, like imports and other notified supplies, the recipient may be liable to pay the tax under the reverse charge mechanism.
For intra-state supply of goods and services, you would have to pay Central GST (CGST) and State GST (SGST). For inter-state supply of goods and services, you would pay Integrated GST (IGST). In addition, certain categories of registered persons will be required to pay tax deducted at source (TDS) and tax collected at source (TCS) to the government account.
At the time of supply of goods and services during one of the three events – on receiving payment, issuance of invoice or completion of supply
You can make the payment in one of the following ways:
The return would not be considered as a valid return. Only a valid return can allow input tax credit (ITC) to the recipient. This mean unless the supplier has paid the entire self-assessed tax and filed his return and only if the recipient has filed his return too, would the ITC of the recipient be confirmed.