Have you earned any income in OK while you have been there as a student? If you have not earned income in OK you have no reason to enter anything about OK on a tax return. You are a resident of the state your parents who can claim you as a dependent live in.
Living away at school is considered to be a "temporary absence" from your home state. If you did earn income in OK, you file a NON-resident OK return first and then prepare a resident tax return for your home state.
https://ttlc.intuit.com/questions/2895920-why-would-i-have-to-file-a-nonresident-state-return
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
