@TomD8thank you again for your very quick response. New York says: "You are entitled to claim this nonrefundable credit for the tax year if ... you had income sourced to and taxed by another state." That fact that they say "sourced to" makes me worry that they will not give me a credit for the portion of the Washington DC taxes that are on income not sourced to Washington DC.
As I mentioned in my previous most just a few minutes ago, I am hopeful that Washington DC will allow me a credit for the taxes paid to New York on income that is not sourced to Washington DC.
