@DeeLuxe , (a) your daughter not having established residency in NH is still a resident of NY; (b) Thus when she files her 2020 return she will need to recognize her NY income plus income from NH. (c) She should consider paying in some estimated state tax for NY -- because when she files , the out-of-state income will be taxed by NY and given credit for taxes paid to another state ( thus reducing the NY taxes owed ) but in this case she will have zero offset. If on the other hand she had been a resident of NH during these nine months ( and then go back to NY and change back to NY residency ), she could have avoided this tax bite. Did she register and vote in NH or voted in NY -- that would be a good test as to her intentions ( even if temporary ).
