Last year I received a six months research scholarship from DAAD within a collaboration with a Germany university. The total grant was around 21550 Euros. At the same time I was receiving my monthly wage from the USA.

A scholarship in Germany is tax free as well as in the USA, however, I am bit concerned because at the same time I had my salary. I think, in Germany this would be a sum of 1907 Euros as my salary is taxed in the USA. In this case is the scholarship tax free? Do I have to submit a tax declaration in Germany and pay the sum there and apply for "Foreign Earned Income Exclusion" in the USA? Or I just file my tax clearance in the USA?