HM, I'd suggest you speak to your Accountant / Administrator about these questions, as they are not that simple.
Your income is unlikely to need to be put anywhere on your tax return.
The drawdowns DO matter and you can't decide post 30 June (theoretically). There would be minimums you must each withdraw and (again theoretically) the amounts should have been minuted already or a request from yourselves to the fund made during the year.
This may also be relevant to Centrelink benefits, if you get any.
