Bruh, it gets submitted as soon as you pay and submit. For assessment date initiative, you can click the small document icon right beside the file number. Here, you will see a default message then expanding it will reveal you the date it was moved to Assessment, as they ask for documents upload even when in the message it says, there is nothing you are reuiqred to do at this moment. From there you can see when they asked you to upload any document, and what was its expiry date. That's the date, in my opinion, when the application was moved to Assessment.