There are two ways to do this. You can set up the app so that these details are added to every report automatically, or you can add these on a per-report basis. A company logo can only be added through Settings.
1) Tap the Settings tab.
2) Tap on Customisation.
3) At the top of this screen, you will see three options under "Company Settings", allowing you to add a Company Name, Auditor Name and Company Logo from your Camera Roll.
Manual (Per-report basis)
1) Tap on the Projects tab.
2) Tap on the Project you require to go to it's Summary screen.
3) Tap on "Add Info". You will see a section for Auditor Company and Auditor Name at the bottom.