@ shabo 4 inputs are required as follows:-
....on the main Skillselect website: www.skillselect.gov.au
click 'I accept' then type in - Username (ie. EOI no.) and Pass phrase
once you have logged in --- you will look to the right.....on the menu there towards bottom,
there is a link: Continue a Saved Online Visa Application
CLICK THAT
now,you will need TRN no. and Password....
(your agent should be able to suppy you with all 4 input fields)