This discussion addresses two common billing errors: issuing the same invoice number to multiple customers and using an incorrect GSTIN. Experts suggest rectifying these issues by issuing credit notes for the incorrect invoices and then reissuing correct invoices. Customers can then claim Input Tax Credit (ITC) on the updated, accurate invoices.
29 June 2020
If these invoices are recent then you can issue credit notes and issue correct invoices and ask customer to take ITC on corrected invoices.