Thank you for the response.
So even though the work performed in Michigan wasn't for a MI employer I still have to file a nonresident return there?
As for the NY resident credit, the NY state tax website states you are entitled to claim a resident credit if "you were a full-year resident of New York State and you had income sourced to and taxed by another state..." I understand the convenience of the employer rule applies for nonresidents, but is it possible for NY to try to reject my resident credit by arguing that the income taxed by Michigan isn't "sourced to" Michigan since it derived from a NY employer and not a MI employer?
Additionally, if I apply the credit can I end up getting penalized if NY ends up saying I can't claim the credit for whatever reason?
