State tax filing

I physically performed all my work in New York  so I guess I'm good to go without filing a CA return. However, I'm a little hesitant about not filing because of the way NY wants to see everything and get their money regardless of how it's earned. Is there any reason not to file a CA non-resident  return (other than it's unnecessary work)? If I do file a CA return, will the TurboTax software ask the proper questions such that it knows I was not in CA and therefore determine I owe no tax?

Since there was no withholding in CA, will my employer even send my W2 results to the state of CA?

Sorry to belabor this point but I just want to avoid any issues with any state tax departments.