State tax filing

As I'm preparing to file my taxes now. I just want to be clear about what my state tax filings should look like for 2020 based on the info I provided and the insight of the messages above. From Sept 2020 through the end of the year, Nevada was the place I lived and worked in. I held a permanent job, showed up to work, spent money, and paid for a place to stay in Nevada. However, I still had a California drivers license that whole time. How important is having that NV license when determining residency? Knowing that I never had a Nevada license in 2020, would I still be considered a CA part time resident and NV resident, so I would only need to file for CA part time resident tax?