I am creating invoices but if I add any non-stock items with a zero value & a 'NO VAT' tax I'm getting an error message 'Liability account is required' so unable to save

Hi Mrshawkins, 

We are aware of the issue there is an investigation on this, the engineers are working on a fix. On the invioce  where is says amount are and says either inclusive or exclusive of vat if you choice no vat their then save the error wont show.