I haven't completed one of these either so can't be sure but would assume the following:
1) Turnover (not including VAT)
2) Business Taxes excluding those mentioned
3) Total spend for the year on fixed assets (not including VAT)
If you need any more information the person you need to speak to, along with their telephone number are printed in red a third of the way down the front page of the form.
Sorry I couldn't be any more specific but I hope this helps.