Q. I reside in TX and work for a company in TX but occasionally work remotely for the same company while visiting family (around 15 days in the year) in CA. Do I have to pay CA state income tax on that 15 days of work?
A. Yes, but "nobody" does. See http://money.cnn.com/2013/06/28/pf/taxes/business-traveler-tax-threat/ If you live in a state without an income tax (e.g. FL or TX), it’s more likely you should file in the work states. You can't use the "it all comes out even" rationale for not filing.
