FRS Vat surplus on corp tax submission

Hi there clever people,

quick question on Corp tax submission...client is registered for FRS vat and naturally has some surplus on vat after paying hmrc, which he uses in the business....I was always told that VAT is not a turnover, but according to HMRC that's where you need to enter it, is that right? do I need to add the difference between what's been charged out to what's been paid over - to the turnover? If I enter it as 'other income' it won't add it in to the total...pls help..thanks in advance