A is simply the last (and sometimes only) Statute Invoice on the matter. As per Interim Statute Invoices, it is final and enforceable. Where you have previously raised any Interim Non-Statute Invoices, then a finalises such Interim Non-Statute Invoice, and makes them legally enforceable and closes the period to which the relates. The total of each Interim Non-Statute Invoice appears on the and credit will be applied for any payments received. All Interim Non-Statute Invoices need to finalised by a Final Statute Invoice, even if they have been paid.
Where you require the Invoice to be marked as a you select the option entitled Closing' invoice in the invoicing section of Keyed-In.
You can see the Invoices you have rendered and see a chart showing your invoicing history month by month in Keyed-In.