By disabling the system voucher functionality, all vouchers created by Period & Year will be deleted for the ongoing period.
Note that the VAT period will be updated accordingly when you change reporting periods.
If you select bimonthly reporting, the VAT period will also be changed to bimonthly (if it is not already selected).
By selecting quarterly or four-monthly period, the menu option VAT & fees will be hidden as these reporting periods cannot always be combined with the VAT periods reported on the client.