Open Settings → Staff users, find the team member, and select the trash icon (Remove user) in their row. Check the name and email in that row, then confirm Remove user. The business owner can't be removed.
Removing a user revokes their access to this business. It does not require deleting operational records they created in the past.
Complete the change as soon as the person no longer needs access. If they still work at another location, update their assignments instead of removing them entirely.
After removal, verify that the user no longer appears in the active team and that another administrator can perform any account tasks they previously owned.