I had income in CA, MT, UT and NY. Do I have to file a return in each State - I'm as MT resident

[KatrinaB]

It depends. Each state has its own filing requirement for nonresident taxpayers. Please view the filing requirements below.

Utah: Every nonresident with income from Utah sources who must file a federal return need to file.

https://incometax.utah.gov/instructions/who-must-file

New York: If your New York source income exceeds your New York standard deduction then you are required to file a nonresident state return.

https://www.tax.ny.gov/pit/file/nonresidents.htm

California: You must file a Califonia nonresident return if your income from all sources that is more than the amount defined in this chart.

https://www.ftb.ca.gov/individuals/FileRtn/index.shtml

Follow the directions in the TurboTax FAQ below if you need to file a nonresident state return. You must prepare your nonresident states before your resident state.

https://ttlc.intuit.com/replies/3302052