When you log in to a new site or change your password on a website, you should see a Dashlane pop-up asking you to save or to replace this password in Dashlane.
However, if you previously clicked on Never for this website when asked whether you wanted to save your password in Dashlane, then Dashlane will no longer prompt you to save or replace your password for this site.
To undo this setting, go to Tools > Preferences on Windows, and Dashlane > Preferences on Mac. Then select Reset website list. Note that this will reset this setting for all of your credentials.
Also if you're on Internet Explorer, please check that the pop-up didn't appear behind your browser.
If you're still not seeing the save or replace pop-up after following the steps above, please check the article on how to report a learning or filling issue on Dashlane: Dashlane does not fill a field on a specific website. How can I report this?
Finally, remember that you can always check the list of passwords generated by Dashlane to find any passwords that weren't correctly saved. Find out more about this here.