According to the crypto asset record keeping guide by the Australian Government, you must keep records of each of your crypto assets and every transaction, to work out whether you have made a capital gain or loss. For your crypto assets, you should keep: receipts when you buy, transfer or dispose of crypto assets, a record of the date of each transaction, a record of what the transaction is for and who the other party is (this can just be their crypto asset address), exchange records, a record of the value of the crypto asset in Australian dollars at the time of each transaction, records of agent, accountant and legal costs, digital wallet records and keys, a record of software costs that relate to managing your tax affairs.