You do not need to file a New York return. You only need to file the Maryland return because you are considered a resident of Maryland. You will report all of your income on the Maryland return; this includes the income from New York and anywhere else. You cannot claim to be a part year resident just because you moved out of Maryland. You have to establish residency somewhere else before you will no longer be considered a Maryland resident. This applies to being a nonresident or a part-year resident.
