If you move out of NC in 2020, you will have to file a 2020 NC part-year resident return only if your NC-source income exceeds the NC filing threshold for your filing status. For the details about that, see the "part-year resident" section of this web reference: https://www.ncdor.gov/taxes-forms/individual-income-tax/individual-income-filing-requirements
Interest income earned as an NC resident is NC-source income.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
