CGT - order of bought vs sold shares

When I buy shares over time; then sell some of it, is there a choice which "share lot" I sell for CGT purpose. For example:

Jan 2021 buy 100 CBA shares
June 2021 buy 200 CBA shares
March 2022 sell 50 CBA shares

Clearly I want to sell 50 shares of 100 shares that I bought in Jan 2021(when I make a profit) so I can get CGT discount because I hold it for more than 12 months. Is there anything specific I need to do or ATO treat these "liquidations" based on certain rules - i.e. FIFO (first in first out), or LIFO (last in first out) or something else.

Thanks.

 

see
Tax Tip 148: CGT and Different Parcels of the Same Shares Tax Tip 148: CGT and Different Parcels of the Same Shares

 

Thanks Terry. You guys are legends.

Frankly speaking it seems a bit confusing from that thread, and after I read it, I wonder what happens if I choose averaging cost for one year, then FIFO the next year. But dont worry about that for now.

I will assume FIFO, which seems to be default case and let the expert / accountant to decide at the tax time.

 

if you can distinguish between the parcels there is no issue, if you cannot then use the FIFO rule.

 

Most use FIFO until a specific trade is better to use specific identification for.