Do I have to file with CA state?

I didn't make enough money to reach the federal standard deduction, so I am only filing with the IRS to get my federal taxes withheld back.

 

Because California has a lower standard deduction, TurboTax tells me I owe California $56. But do I have to file with California?

 

I don't think I do because form 540 instructions say you don't have to file unless your gross income reaches $19,310 and I'm nowhere near that.

I went ahead and paid California the past two years because of what TurboTax calculated, and now I think that was a mistake. I shouldn't have filed with California because my gross income was well below $19,310.