You will be notified if you try to accept a GST return when you have any of the following:
For Payments (NZ) or Cash (AUS) Basis GST, GST on receipts and payments is reported in the period they are allocated. Unallocated receipts and payments will not be included in a GST (NZ) or BAS (AUS) Return. Unallocated receipts and payments are shown on the GST Return Form - Source tab. Select the relevant Source Module.