The download option to prefill the tax return is included from 2020 tax returns. You will need to:
Import the XML option to prefill the tax return for any returns prior to 2020.
Refer to the Tax Australia: ATO PLS Prefill for more information.
Tax Australia: Error: 'Prefill services completed with errors'
When I try to prefill a return using the Download option I get the error: Prefill services completed with errors