My client issued an invoice dated 26.05.2026 and reported it in GSTR-1. Soon after, he realised it was issued against the old GSTIN of the buyer. When I tried to amend the value of invoice, the portal restricts saying 'GSTIN of the recipient is cancelled'. Neither does portal allow reporting of credit note against that invoice.
Since it is an intra-state B2B transaction, I am also unable to report CN under B2C. My Client does not have any B2C supply. How can I tackle this situation and reduce the tax liability in the returns?
TaxTMI 

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Thank you Sir. I appreciate your analysis and thoughts. Will explore this option if anything else doesn't work. Getting a refund from the department is really a headache in such matters
Dear Sir,
Correct advice to the querist by you. All facts should be brought to the notice of jurisdictional GST Range Officer in writing.
In my view, the problem can be solved without consulting the experts. Your guidelines are sufficient to solve the problem.