CA taxes simple question

[Pacun]

DC hair stylist was hired by a mini star and he traveled twice to CA, 3-day and 4-day trips in 2023.  The company for which he works issued his W2 with CA withholding. 

At first glance, I thought I was ONLY going to ask CA for his withholding refund but because he traveled to CA, I think I should do something different. 

[Lion EA]

He has CA sourced income and would file a CA NR return to report his income and withholding. CA wants their tax at their very high tax rates!