You can apply under section 107B of the Workers Rehabilitation and Compensation Act 1986 for access to some of your records (this is free).
Under Freedom of Information (FOI) laws, you can apply to see or ask for a copy of your claim and other records. There may be some documents that this does not apply to. There are prescribed fees that apply, which may be waived in certain circumstances.
Freedom of Information - Application for access
Freedom of Information - Application for Review of Determination
Freedom of Information fees and charges