To change your personal email or phone number so that they do not show up on invoices, reports you would go to Settings > Locations > Click edit pencil beside the location > Change the email and/or phone number. Click Save when you are done.
If you have chosen Use Main Company Info on Reports (found in Settings > Locations > Edit Location > Checkbox), then you would go to Settings > Company Info > Click the edit pencil > Change the email and/or phone number. Click Save when you are done.