It's super simple to raise and edit invoices inside Vincere.
Ensure it's toggled on inside Marketplace (settings > marketplace) and select all the users you wish you have access to invoicing (we'd recommend just your back office team - consultants don't need access to invoicing for the automatic generation to happen).
Next toggle on the Invoicing shortcut from the sidebar menu:
And head to Pay&Bill > Invoices tab:
Voila! Welcome to Vincere Pay&Bill: