I was able to login successfully. Follow below steps
1. After reaching to online application, click "APPLY NOW"
2. If you have filed previously, click "Yes" to "DO YOU HAVE AN EXISTING ACS ACCOUNT OR HAVE YOU PREVIOUSLY STARTED AN APPLICATION?*
3. Once you click "yes", "Login" button will appear. Click on Login
4. It will take you to member login page, since you don't have member ID, Click "Reset Your Password" below "Member ID" box
5. Enter "Email ID" used for previous assesment in "Email Address" box and click "Submit"
6. You will get this msg "An email has been sent to you with instructions on how to reset your password. If you do not receive an email from us within 24 hours, or if you require assistance to reset your password, please call us on 02 9299 3666 or email
member.services@acs.org.au for assistance."
7. Now go to your mailbox and look for email from ACS with subject line "Your new ACS Membership password" from ACS Membership
8. Click on "Change my password" link in the email body.
9. Enter your desired password in the "New Password" and "Confirm Password" box and then hit "Submit"
10. It will take your automatically to your ACS dashboard. In future you can use your email ID and password set now for login
Note: The New Application, Review and Appeal applications are currently being upgraded and temporarily unavailable. This functionality will be available by 28/06/17.
Let me know if you face any error