DHA upgrades to the online ImmiAccount system were implemented during the evening of 2 March 2018 however users are encountering problems uploading documents in the new system and are concerned about meeting DHA's new "2 day" policy where primary documents for applications must be uploaded within 2 calendar days from lodgment or the application is liable for refusal without any further request for documents.
DHA has announced further details of the new TSS visa program. While the implementation date was not announced, implementation of these changes is expected for early March 2018.