Bitcoins exist as ‘unspent transaction outputs’ (UTXOs), not as an ‘tackle with a stability’. Should you actually really feel the necessity, you possibly can import your keys into some pockets software program which can can help you train ‘coin management’, which suggests it is possible for you to to select and select which UTXOs are used as inputs when making a transaction. So then you possibly can simply select all of your UTXOs and ship them to a brand new tackle in a single transaction, after which do the identical on your spouse’s UTXOs.
However doing so will put your funds at extra danger, as you may should belief the brand new pockets software program/gadget you import your pockets into. Mishandling personal keys can result in a lack of funds (theft), so that you should not do that until you are feeling it’s completely needed.
Actually, I might simply create a transaction that pays you your share of the cash, and one other transaction paying the remaining cash to your spouse. Inside a bitcoin transaction, it doesn’t make any sense to level to some particular output and say “these bitcoins got here from this particular enter”. Slightly, it’s as if the entire enter cash are melted down into one blob, after which the output cash are solid anew from this blob. So it does not make an excessive amount of sense to fret about monitoring ‘your particular cash’ by means of time, as every ‘particular coin’ is ‘melted down’ when it’s used as enter to a transaction.
Give it some thought like this: whenever you do your accounting, do you are worried concerning the serial numbers printed on the $20 payments, or the worth of them? Your bitcoin accounting can work in a lot the identical means: how a lot bitcoin did you purchase? How a lot did you promote? That is the related data.
Will this work and be cool to the ATO?
Questions on methods to satiate the calls for of any specific tax authority are going to be off-topic right here, you’d do higher asking an accountant or tax lawyer for those who want such recommendation.