NJ schedule A, credit for taxes paid to New York
what amount to enter on line 1 of NJ schedule A? State instructions are very confusing. Saying: "When claiming credit for taxes paid to New York, Line 1, Schedule A of the NJ‑1040 should reflect the “New York State Amount” actually taxed by New York from the New York IT‑203. Certain adjustments may be necessary to determine the income actually taxed by New York State". What does "actually taxed by New York from the New York IT‑203" mean? What is corresponding line on NY form IT-203? Is it adjusted gross income, for example?