...
- Control-click the account you want to rename in the sidebar and choose Rename Account.
- Type a new name for the account.
- Press Return.
...
- Select the account you want to edit in the sidebar.
- Click the Settings icon in at the bottom , of the register toolbar OR choose Accounts > Settings from the Quicken menu.
- Type a new name for the account in the Account Name field.
- Press Return.
...