Go to Manage / Organisation / Companies. Then click 'Edit'. Enable or disable 'Exempted from VAT' in the tab 'Properties'.
In companies that are exempted from VAT, booking proposals are created without VAT and it is allowed not to select a VAT code in a booking.
It is also possible to change company settings in bulk by selecting multiple companies and then choosing 'Edit' via the bulk action.
Point of attention
Only with Twinfield, Exact Boekhoud Gemak and Multivers this field is synchronized when adding a new company.