10to8 will already know many details about your business from the signup process. If you want to make changes go to "Set Up" > "Business Details".
Here you can edit your Business Name (and short name for SMS), the Email, Phone number and add the link to your Website.
This information will appear on your online booking page. If you don't want to show specific information, leave it empty.
To find out more about setting up your online booking page, click here