Then there's the question of whose 'tax year' we're talking - theirs or ours? In Oz the tax year is from 1July year X to 30 June year X+1 ... The complexity of the issues is never-ending.
As a federal superannuant living on taxed income derived from the Oz federal budget each year + taxed earnings from investments derived from my federal retirement lump sum, I intend to do nothing. When or if asked (and I suspect I never will be), I will have photocopies ready of all the Oz tax I pay each year. After that, mmmm.