This is a common scenario. We clear consignments electronically, therefore when
Customs attempt to process your manually submitted B374, they will see that it’s already been
cleared by a broker and disregard your documentation.
In a worst-case scenario, if they miss to realise this and also process it, they will send you an email and at that point you need only to reply with “It’s been cleared by a broker, please disregard” and they will do so at that time. You don’t need to pay duty/GST twice.
