@glenda02 to answer your queries, this is my response:
1.) EOI jobs being declared should be supported by either ITR's or payslips duly signed by HR or your immediate superior. As not all employers in the Philippines for instance issue ITR, recent payslips will suffice.
2.) Create an immiaccount online (if you are applying without an agent). You could start from there. Make sure all your scanned documents were colored scan, if not, you should have your documents be notarized.
Hope this info helps.