This doesn't seem to work. It seems be be only for taxes paid on foreign sourced income (FSI). When I select that I have not received any FSI, it says that I am not eligible for the Foreign Tax Credit. I also tried to select the option to itemize my foreign tax deductions, but that didn't work either. To be clear, all of my income is US based, but I live in a country that has a double taxation agreement, and taxes paid here are a credit against my US taxes. Maybe Turbotax doesn't support this situation?
