Company headquartered NY. Live in SC. Sometimes in office in NC. W2 line 15 NY & SC same wages under both, but state income taxes only under SC. Which state to file?

[nmkx06a]

Do I need to file NC, NY and SC, or NY and SC or report only SC since that is where state income tax was listed and my residence? Lived in SC for the whole year.

[nmkx06a]

What about the duplicate wages reported to NY?

[usedcash]

File state taxes where resided for the whole year - SC.  This is shown by state income tax listed entirely for SC. Only if you resided part or entirely in another state would you need to report amounts earned in that other state.