re: "Ottoman Turkish Empire settlement payments?"
The US Treasury should be sued for entrapment. Try as you might to be squeaky clean, you are doomed to get something wrong due to the ridiculous amount of complexity involved in a tax return!
I have to give up an entire week just to calculate my taxes. That's a week of income. I should not have to pay an accountant, who can only plug the numbers I give him into HIS computer, on top of paying the US Treasury and losing a week of income. Come on people, let's come up with a better plan!