You will be taxed on your wages both where they are earned (NC) and in your home state (SC). However, you will get a tax credit for the NC taxes (nonresident state) you paid on your SC tax return (resident state). This is how the states avoid double taxation by allowing a state credit in your home state. Towards the end of the state information, you should see a list of other state tax credits (screenshot). NC is not listed, you can add the NC state tax credit here. (Just remember that you will not get a tax credit in your nonresident state for taxes that you pay in your resident state)
You will need to
file as non-resident for NC (for your NC source
income only). You will also need to file a SC resident state tax return (for all income from all sources including
NC). You will get a state tax credit in SC for the NC state taxes the
your paid on your nonresident NC state tax return.
You will want to
work on your non-resident NC state tax return first. You will then take a tax
credit from your non-resident NC return on your resident SC state tax return.
(Please note that you will only get a tax credit for your NC taxes up to the
amount of SC taxes that would have been paid if the income was earned in
SC).
Just follow the
TurboTax guide when working on your states (remembering to do your non-resident
state return first) and TurboTax will do all the calculations for the credit to
your resident states return
Here is additional information about filing in multiple states (select "see more answer" to view the entire attachment)
https://ttlc.intuit.com/replies/3300797
