While not definitive, if you set your address on the profile tab DO seems to localise your tax requirements. While I’m not able to tell because AUD still uses a $, you might be able to test it out and see if a conversion takes place.

My guess is that it is much easier for a US based company to charge everyone in USD, but I may be wrong.

To whom it may concern,
I would like to ask if there is a possibility of changing the currency on the invoices in order to make it easier to match deductions from the bank account with the invoices and therefore make my life a bit easier for the taxational year.

I am in Australia, for not be able to have the billing preference set to AUD for tax purposes is madness for a company that trading all over the world. AWS could be the option here folks!