From the 2024/25 income year, small businesses with turnover under $50 million have up to four years from their tax return assessment date to request amendments. Businesses should submit requests early and keep accurate records to ensure the ATO can process them before the deadline. 

Please contact us directly if you need any help with this.

(Ref:https://www.ato.gov.au/businesses-and-organisations/small-business-newsroom/changes-to-income-tax-return-amendment-period-for-business)