On January 14, 2021, California’s Supreme Court concluded in Vasquez v. Jan-Pro Franchising Int’l, Inc. (2021) 10 Cal.5th 944, 273 Cal.Rptr.3d 741, 478 P.3d 1207 that its Dynamex decision and its use of the so-called ABC test, later codified after the passage of Assembly Bill 5, applies retroactively.  The Vasquez holding subjects taxpayers, potentially even…