get https://api.piriod.com/invoices//finalize/
Finalize an Invoice object. When the invoice is finalized, it is validated with the tax agency if the invoice document type has tax regulations. After finalize you will no longer be able to update your invoice data. The status attribute of the invoice object will become to finalized. The local_file attribute of the Invoice object will have a url to get the file that was sent to the tax agency, normally it is a file with an XML extension.