This confirmation of European Tax Status for the given tax year is issued by the tax office in your country, the place being dependent on your permanent residence. You must request the form E9 with the condition being a filed tax return for the given year.
According to the austrian income tax law a person who works in Austria, does not have permanent residency in Austria and is a resident from another EU member country will be acknowledged as a tax resident of Austria when using the form E9 thus enabling that person to benefit from the perks of the austrian tax system when certain conditions are met:
This document is used not only in Austria but also in Germany, Belgium or Luxembourg.
Form E9 is used for confirming the income of your wife/husband as well. The taxpayer is eligible for a tax relief if the worldwide income of his wife / husband is lower than 6000 €.
Is this article related to your situation? We are preparing an app for you for tax refund from Austria. Fill out your form on Neotax.eu.