CA tried to tax soldiers for TDY duty in their state. Those at DLI for 1.5 years got stuck with paying CA state income tax AND their home of record state income tax. I think some legislation unscrewed THAT fiasco.
That happened to me as well; only spent one year at DLI, but made the ‘mistake’ of mailing my federal income taxes from a CA address. By the time we were overseas, the CA Franchise Tax Board tracked us down and started threatening to garnish my pay.
I was told, and verified it, that CA has a law on the books concerning retired military pay; they want a percentage of the tax on income based on the percentage of years served in CA. They admit there’s no way to enforce it, but it’s there.