Hello. I've lived in North Carolina for almost 2 years and I'm about to file for residency here in March. Do I still tick that I'm a resident of North Carolina?

[Cynthiad66]

Yes.  Sounds like you are and have been living in North Carolina consistently.  A little confusing when you say you are about to file for residency here in March.  Here meaning North Carolina?  

However, keep in mind that you have provided little information here.  Your situation could be more complicated than expressed.  So, if you have other information about your residency, please provide it so that we can specifically answer your question.  You may be in Military and now selecting to change residency or you may be working remotely etc.  

[SteamTrain]

....or are you a college student going to a College/University in NC, under age 24 whose parents claim you as a dependent.

Details..details....

[TomD8]

"...I'm about to file for residency here in March..."

Residency for state income taxes isn't something you "file for".  It's determined by state law.  North Carolina Statute 105-153.3 defines "resident" as follows:

Resident. – An individual who is domiciled in this State at any time during the taxable year or who resides in this State during the taxable year for other than a temporary or transitory purpose. In the absence of convincing proof to the contrary, an individual who is present within the State for more than 183 days during the taxable year is presumed to be a resident, but the absence of an individual from the State for more than 183 days raises no presumption that the individual is not a resident. A resident who removes from the State during a taxable year is considered a resident until he has both established a definite domicile elsewhere and abandoned any domicile in this State. The fact of marriage does not raise any presumption as to domicile or residence.

https://www.ncleg.gov/enactedlegislation/statutes/pdf/bysection/chapter_105/gs_105-153.3.pdf