I am preparing taxes for a friend who lives full-time in NYC but has a part-time fully remote job in Arizona (she's never set foot in AZ). She ALSO made money remotely in NY- the breakdown was 20% AZ income, 80% NY income. Does she need to file a state tax form for AZ? If so, does she need to declare her non-Arizona income? Does she have to declare her Arizona earnings on her NY state return?
Based on my research, I'm assuming 'yes' for both questions but will she get double taxed for the states?
Thanks.
