Errors like this mean that one or more of the tax codes (Australia) or GST codes (New Zealand) don't have a linked account.
Make sure each of your Tax/GST Codes have linked accounts.
Go to the Lists menu and choose Tax/GST Codes. The Tax/GST Code List window appears.
Click the zoom arrow next to each Tax/GST Code and ensure linked accounts are specified. Here's an example:
Repeat for all your Tax/GST Codes.