I worked 7 months in California as a contractor. My employer is in Massachusetts but the client is in California. Based on the non-resident income tax form, only California source income is subject to income tax. I think my income is not based in California. Am I correct? My employer withheld CA income tax.
I worked 7 months in California as a contractor. My employer is in Massachusetts but the client is in California. Based on the non-resident income tax form, only California source income is subject to income tax. I think my income is not based in California. Am I correct? My employer withheld CA income tax.

Thanks for all the replies. The reason that I don’t think it is CA source income is because I never seen anyone on business trip to CA ever had tax withheld even when staying for extended period of time.