You always authorise a person for only one specific service, for instance loonheffing (LH), loss of earnings, or algemene bestedingsbelasting (ABB). You can only authorise one person or company per service. You can subsequently authorise this person or company for multiple services. An authorisation is granted for an indefinite period of time but you can change or revoke it at all times.
Even if you have already authorized someone to submit online tax returns ABB (General Expenditure Tax), LH (Wage Tax), and Loonderving (Loss of Wages, Social Affairs and Employment), you nevertheless need to authorize someone separately to submit the verzamelloonstaat.