My residence is in Texas. I work in and live in Texarkana AR Monday through Friday. Do I file non-resident status, or part-year resident stat us?

I live in Texarkana AR on purpose, due to a 'tax waiver' that is allowed if I am residing on the Arkansas side of Texarkana, but I just moved there in mid-December. Up until then, Arkansas withholding was coming out of my check, but that stopped after I filled out the waiver form.