Hello Guys,
I moved to Germany in August 2017. I am working with a firm to help file my taxes and I have been told that I will need to pay a sum of money (extra taxes) because of the salary income I had earned before moving to Germany in 2017 (in Dubai). They called this "progression clause". I have of course asked for a clarification but I wanted to see if anyone is aware of that? They said the salary I earned that year before moving to Germany has to be considered to determine my tax rate in Germany, is this possible?