If your stay in New York was temporary, and you then returned to your previous main, primary home in SC, then you would file a non-resident NY return (if you have a NY tax obligation), and a resident SC return.
NY taxes non-residents only on NY-source income, such as earnings from work performed within NY. Your resident state of SC can tax all your income, regardless of where you earn it. You would be able to claim an "other state credit" on your SC return for any taxes you had to pay to NY, so you wouldn't be double taxed.
Using TurboTax, the sequence is Federal > Non-resident State > Resident State. Proper sequence is important so that the program can calculate and apply the "other state credit" to your home state return.
You mention that you "have no W-2's" but make no mention of what income you did have-----what income did you receive in 2024? We cannot tell if you even need to file a tax return without more information. If you do have to file, then you file a federal return, then part year returns for NY and NC.
Who has to file?
http://www.irs.gov/uac/Do-I-Need-to-File-a-Tax-Return%3F
https://ttlc.intuit.com/questions/1901227-how-do-i-file-a-part-year-state-return
https://ttlc.intuit.com/questions/1901560-how-do-i-file-if-i-moved-to-a-different-state-last-year
If your stay in New York was temporary, and you then returned to your previous main, primary home in SC, then you would file a non-resident NY return (if you have a NY tax obligation), and a resident SC return.
NY taxes non-residents only on NY-source income, such as earnings from work performed within NY. Your resident state of SC can tax all your income, regardless of where you earn it. You would be able to claim an "other state credit" on your SC return for any taxes you had to pay to NY, so you wouldn't be double taxed.
Using TurboTax, the sequence is Federal > Non-resident State > Resident State. Proper sequence is important so that the program can calculate and apply the "other state credit" to your home state return.