You can update
...
your Email/Quicken ID
...
at any time. Your email address is
...
used
...
as your Quicken ID
...
.
Update your Quicken ID
...
Choose Edit menu
...
→ Preferences.
In the left pane, select
...
Quicken ID
...
&
...
Cloud Accounts.
In the right pane, under Quicken Profile,
...
select Update Profile.
The
...
My Account screen displays.
Select Change Email/Quicken ID
...
.
...
Update your Email Address
...
Enter your new email address for the Email/Quicken ID.
Enter your Current Password.
Click Save Changes.