Is there sales tax on digital goods in Australia?

Live answer from a working API, not written from memory.

Digital goods in Australia are taxed at 10% (GST).

Flat 10% GST applies to digital services supplied to Australian consumers.

Check it yourself

curl "https://checkout-tax-api.pages.dev/rate?country=AU&product_type=digital"

Need every jurisdiction in code?

EU-27 + UK VAT, US state sales tax, Canada GST/HST/PST and Australia GST, with the reverse-charge decision logic, are all in it. It also ships as a one-time $49 self-host kit, which is off sale for the moment — a packaging fault broke its install step, and rather than take money for something that fails on the first command I have pulled the buy link until the corrected build is listed. Email craniusmaximusllc@gmail.com if you want it now and I will send it. The hosted API is free either way.