2. Under Rule 50 of the CGST Rules, where the nature of supply cannot be determined at the time of receipt of advance, the supply is deemed to be an inter-State supply and IGST is payable.
However, Rule 50 does not prescribe any deemed State as the Place of Supply (PoS) in such circumstances. This creates a practical difficulty because GSTR-1 requires a State to be selected while reporting the advance.
The important distinction is:
- Nature of supply: Rule 50 deems it to be inter-State.
- Place of supply: Rule 50 does not deem it to be any particular State.
Therefore, the supplier's State cannot automatically be reported as the PoS merely because the portal requires a State code.
Where the recipient is identifiable and the eventual supply can reasonably be connected with the recipient's State, reporting the recipient's State as the PoS is the more defensible practical approach, subject to the applicable PoS provisions and facts.
However, where neither the actual PoS nor any reasonable State can be identified, there appears to be no specific statutory provision prescribing a default State for GSTR-1 reporting. Selecting a State solely to satisfy the portal requirement would not have an express basis in Rule 50.
Thus, the appropriate position is:
IGST should be paid because Rule 50 deems the supply to be inter-State, but Rule 50 does not itself prescribe which State should be reported as the PoS.
The issue is essentially a reporting-system gap: GSTR-1 requires a State code even though the law may not yet permit determination of the actual PoS.
Once the underlying supply becomes identifiable, the advance should be appropriately adjusted/reconciled with the subsequent tax invoice and actual PoS.
In conclusion: If the recipient's State is known, reporting that State is the more practical and defensible approach. If even the recipient/PoS State cannot reasonably be identified, there is no clear statutory "default State" under Rule 50, and obtaining a written clarification from the jurisdictional authority/CBIC would provide the strongest compliance support.