Choosing carbon accounting software for AASB S2 and ASRS reporting comes down to five things: an audit trail that survives assurance, annually updated emissions factors, defensible Scope 3, automation that removes the data-collection grind, and local support that knows the regime. This guide breaks down when to move off spreadsheets, what auditors actually want to see, and how the main ANZ and global platforms compare — including where BraveGen fits, and where it doesn't.