The Electoral Commissioner is required to publish all returns lodged under Part 13A of the Electoral Act 1985. 

Returns from January 2018 onwards can be viewed on the funding and disclosure portal. Returns lodged prior to the introduction of the portal can be viewed below:

Return period: 1 January 2017 to 30 June 2017

Associated entity
Donor
Political party

Return period: 1 July 2016 to 31 December 2016

Associated entity
Donor
Political party

Political expenditure returns: 2016-2017

You can also inspect returns at the Electoral Commission SA's office at Level 6, 60 Light Square, Adelaide, during business hours.