A client has rejected 17 invoices from May 2019 due to clerical errors, despite the GST being paid and returns filed. The client now requests invoices dated the current date. The discussion explores the consequences of issuing new invoices, the possibility of raising credit notes for the old ones, and potential legal or compliance issues. It highlights that issuing invoices with a current date for past services is not permissible, but a credit note followed by a fresh invoice is a potential solution, though amendments to previous filings might be necessary.