After logging in into cic account, click on "Check status and message" where you can see the status. After reaching that page at bottom left, you can see "view submitted application". Click on this. You will be taken to "Permanent Residence application" page.
Click on "continue" button here at bottom left. You will be in "Documents submitted by the client" page. You will be able to see new entry for requested document here. Scan and upload.
After logging in into cic account, click on "Check status and message" where you can see the status. After reaching that page at bottom left, you can see "view submitted application". Click on this. You will taken to "Permanent Residence application" page.
Click on "continue" button here at bottom left. You will be in "Documents submitted by the client" page. You will be able to see new entry for requested document here. Scan and upload.