@Annopter - If you had the Humble address all year, I think it's pretty clear, you need to file an AR return and pay tax on your AR income.
"Arkansas residents whose permanent residence is within the city limits of Texarkana, Arkansas are exempt from Arkansas individual income taxes. " Reference: https://www.dfa.arkansas.gov/images/uploads/incomeTaxOffice/texarkana%20exemption%20letter.pdf
