CA is the only state I've come across that doesn't seem to offer such a statement of general explanation with the E-Filing.  Anyone find a workaround? 

Often I like to add a general footnote to clarify a return being filed, for example, right now I'm filing a late CA non-resident return for a prior year for the sole reason to establish a passive activity loss carryforward that year.  So the return looks a bit goofy at first glance with zero CA source income and zero taxes owed.