What state do I fall under?

Hi, 

So I left active duty in Dec 2019, and I would always file under Texas (where I’m from). After I separated from the military, I decided to be a stay at home mom. I am currently living in Oklahoma, but I have a license from North Dakota (prior duty Station). I’ve been living in Oklahoma for a year and a half now. My husband is from South Carolina and has always filed with them. He is active duty military. My question is, what state do I fall under? Texas? (Where I’m from) Oklahoma (I’ve lived here for longer than a year) ? South Carolina (because I’m my husband’s dependent) ? North Dakota (because of my license)? Thank you in advanced! I hope this isn’t too confusing! 
this is my timeline if it’s more clear :

2014- 2019 (AD military, filed under Texas, lived in North Dakota)

June 2019- moved to Oklahoma

Dec 2019- officially separated from military