You may need to describe the work situation...where the work was actually done..etc.
Example: You live in TX, but worked as a private contractor for a short time in OK.
Then it is OK taxable income and need to file that income in OK as a non-resident
...but if you worked remotely from where you lived in TX and didn't physically go to OK...then it should not be marked as OK income
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*