tax , page-3

if you carry on a business, you can claim a tax loss

but in your case, as you have no idea, you sounds very much like you are simply an investor

if so, you have made a CGT loss

in the case of a CGT loss, follow Abu's link

the income year in which you lodge the CGT loss is the year the liquidator sends you a letter declaring the return you will receive on your investment, which in VCR's case i assume was nil

you cannot use your CGT loss to offset your ordinary income from wages, interest, etc

your CGT loss can only be used to offset a CGT gain