You will be able to select the 'type of client you serve' at the time of creating profile (under My Preferences section). You can also add or edit the the 'clients you serve' setting later on. To do so, first login to your account, and click on your profile picture at the top right corner. You will see your profile page like below. Scroll down to 'My Preferences' section and click 'Edit' button. This will enable you to change 'clients you serve' and other preferences. Once done, please do not forget to click 'Save' button to save your changes.