Tax registration with the authorities :
Austria
Tax registration with the authorities
If planning on staying/working/buying a house etc you must obtain a Lohnsteuerkarte (wage tax card). This document identifies you to the Austrian taxman and is required when dealing with the Tax Office.
Some employees will handle this for you, however if not, you get it from the same place you registered your arrival in the country and it must be given straight to your employer. This tells them what tax bracket you have been put into. Once a year this is returned to you and outlines the amount you earned and the amount of tax you have paid. A new one is issued each year.
Austrian Tax Info - Find your local Finanzamt