Errors like this mean that one or more of the tax codes (Australia) or GST codes (New Zealand) don't have a linked account.

To fix this error
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:
Which accounts do I link?
The linked accounts you need to specify will depend on your accounts list. If you're unsure, speak to your accounting advisor or ask the experts on the community forum.
Click OK.
Repeat for all your Tax/GST Codes.