Good Find Martin, and it's such a pity that the company is here. That was released 5th September. Delisted.com.au is an option, although I could be wrong but I thought that there would be some sort of formal communication from the company / liquidators, which would allow a capital loss to be claimed. According to this ATO thread, we need to wait for a letter from the liquidators.
https://community.ato.gov.au/s/question/a0J9s000000QBXW/p00215109
https://www.delisted.com.au/company/optima-technology-group-ltd-1670379119/
