My wife was pregnant, received disability pay is it tax free?

My wife is a w2 employee, received 10k in disability pay (maternity benefit from the company). It was paid out from the company she works for.  Basically she had X weeks paid at Y% post delivery. I think this was verified thru a 3rd party (UNUM) but was paid out by the company she works for.  

 

Is this tax free?

How do I exclude it from income, if so? (Federal)

How do I exclude it from income in CA if it is allowed to be excluded?