Question: Benjamin (27) is single and an active duty member of the U.S. Marines. He was an Oklahoma resident at the time he joined the military. He was stationed at Camp Lejeune, North Carolina until March 2022, when he was deployed to Germany, and then to Afghanistan. He spent a total of ten days in Oklahoma during the tax year. Benjamin's only income was $19,793 of active duty military pay, which includes $2,977 for his service in North Carolina. He is required to file a federal tax return. What is Benjamin's Oklahoma filing requirement?