Thank you again. To summarize this thread so far: all my income is taxable in both Washington DC (if I am a statutory resident) and New York (if it is my domicile). For the portion of my income that is from Washington DC sources, New York will allow a resident credit. The remainder of my income will be fully taxed in both states, with no compensating out-of-state-taxes credit in either.
If all of that is correct, should I be satisfied with this answer?; is it reasonable according to the standards usually used to evaluate tax policy and laws, or is it effectively a mistake in the tax code logic? To me it looks like unreasonable, double taxation on the portion of my income that is not from Washington DC sources.
