I have the same problem with no refile button showing up on the online version dashboard. What I've done to get to back to the version I need to refile, is gone into the link for the relevant past tax return, ie: For 2003: https://ww1.2023.ca.turbotaxonline.intuit.com/ vs this year's https://ww1.2024.ca.turbotaxonline.intuit.com/.
