By basing yourself at the NC office...
IF you move in 2020, you will still have to file part-year NC & NY tax returns for 2020. But for subsequent years there should only be NC taxes to file (with a potentially lower tax rate, though that will depend on your taxable income)....unless you physically work in some other state in subsequent years.
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IF you remain associated with the NY office, then, along with the 2020 part-year NC and NY tax returns, you will likely be required to file both NC resident, and NY-nonresident tax returns in each subsequent year...because NY assesses a non-resident tax on work done by remote "telecommuters" in many instances...i.e. work that could just as well have been done by someone located in NY. A lot depends on the nature of your work, and whether you re "required" to be in located NC for work reasons other than your personal decision move there.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
