When you have multiple Google Workspace accounts, and you only need to cancel a single seat, you'll use the Google Admin to manage the accounts. Follow these steps to cancel only one of your Workspace email accounts
- Log in to your Google Admin account at www.admin.google.com with your primary email account.
- Select the account you want to delete.
- Click the Delete icon.
- You can find additional information about the Google Admin console here: https://support.google.com/a/topic/2413312