After you create a Dashlane account, you can't change the account's login email address, which we also call your Dashlane ID. You'll always use your original Dashlane ID to access your account. If you want to log in to Dashlane using a different email address, you can create a new account and move your data and subscription to that account.
Alternatively, you can change the email address where you receive messages and verification codes from Dashlane. We call this your contact email address. Changing your contact email address won't affect your Dashlane ID, which you'll still use to log in to Dashlane. But Dashlane will use the updated contact email address to communicate with you.
You can view your contact and login email addresses by selecting the My account menu in the web app and then Account summary.