We understand that since this is a miscellaneous income tax return, basically no attachments are required.
However, although it is optional, we have heard that some people print out and attach the full history file that can be downloaded from the download button in the upper right corner of the screen.
Downloading and printing your ledger
Please check with the tax office for details, but basically no documentation is required, and the rest is optional and depends on the extent to which it is attached.