I have worked from Jan to July 2015 in the UK and from Oct. to Dec. 2015 in Germany. I'm not sure if it makes sense for me to submit a tax return claim. (The tax year in the UK runs from April to April; in Germany - from January to January).
My main concern is that in the UK I was paying 20% in taxes from my brutto (all taxes together amounted to 20%). Whilst in Germany it's 40%. Thus, I'm afraid that by submitting such a claim in hope to get a couple of 100' EUR back (since I was out of work for 2,5 months, not claiming any unemployment money) I may actually myself owe to the state, since I would be submitting the claim in Germany where I would have paid twice as many taxes had I worked in Germany from the beginning of the year.
Are my concerns justifiable?