Although the Supreme Court ruled in 2015 that two states cannot tax the same income, the actual on-the-ground reality of how that works out can get more complicated. You may be taxed by two states on the same income, but receive a credit from one of the states.  And if your legal domicile or residency comes into question, two different states may feel they have the right to tax you and aggressively pursue that money. If you have questions regarding your specific situation and tax liability, it’s best if you book some time to talk with a tax professional.