[GNC] Help needed in Australia

[flywire]

You're on cash accounting for tax. Two GnuCash limitations compared to
other packages you need to understand:

1. No automated GST support for cash accounting (it's manual):
https://lists.gnucash.org/pipermail/gnucash-user/2021-July/097092.html
2. No support for non-account transaction classification (best workaround
manually entering text as tags in comments):
https://bugs.gnucash.org/show_bug.cgi?id=113772

Another fiddly thing is no understanding of the fiscal year, you'll be
entering start and end dates repeatedly if you flick between reporting
periods.

I'm not an accountant but from an accounting perspective, you probably
should have separate books for the company and trust anyway.
Classifications are probably a more sophisticated feature to help
understand how different parts of the business are performing.

I'd highly recommend working through the tutorial in the concepts guide at
https://gnucash.org/docs.phtml particularly
https://www.gnucash.org/docs/v4/C/gnucash-guide/pt02.html before firming
things up.