At the latest when the vacation is coming to an end, you also have to think about what requirements you have to meet for re-entry into your home country. Austria makes it comparatively easy, because unless you come from a “Corona problem country”, you can even carry out a self-test.
Regardless of whether you are a so-called returnee or would like to spend your vacation in the Alpine republic, the currently valid entry regulations must be met. The self-tests recognized for entry and what you have to consider here becomes this Aviation Direct report is recommended. A summary of the currently valid regulations is provided here.
Aviation Direct recorded a short video at the Greek airport of Rhodes explaining the current regulations for Austria. It also explains who has to fill out the Pre Travel Clearance and who does not.