Since you are an NC resident, ALL your income is taxable by NC, regardless of where you earn it.
Income you earn by working in MD is also taxable by MD. Here are MD's rules for taxation of non-residents: https://taxes.marylandtaxes.gov/Individual_Taxes/Individual_Tax_Types/Income_Tax/Filing_Information/...
Therefore you must file both a non-resident MD tax return and a home state NC return.
As @Hal_Al stated, you'll be able to take at least a partial credit on your NC return for the taxes you pay to MD, so you won't be double-taxed.
In TurboTax, be sure to complete your non-resident MD return before you work on your home state NC return, so that the credit flows properly.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
