After having signed up to Vercel, you've automatically received a Personal Account, which you can use to deploy Hobby projects. To deploy commercial projects or collaborate with others, however, you can create a Team instead.
Teams offer additional functionality and resources, specifically tailored to the needs of organizations and professional use cases.
You can create a Team by clicking on the scope selector on the top left, and then choosing "Create a Team":
Next, you will be asked to set a URL for your new Team:
After adding the URL, click Save to create your new Team.
You can switch between Teams and your Personal Account by using the scope selector at the top of the dashboard:
Your Personal Account and each of your Teams can be configured individually. Once you have switched to the scope of your choice on the dashboard, select the Settings tab to view configuration for that scope:
If you are the only remaining Member, you should delete the Team instead.