I have my airplane registered in a "Mutual Benefit Corp" in the state
of California. Every year I get a nastygram from the state saying I
need to fill out some soft of tax return.

This is very odd. Are you sure it's a tax return and not a mere
report? I have a New Hampshire corp. I don't have to fill a tax return
unless it grosses more than $50,000. However, I do file a one-page
report and pay a $100 fee every February.

all the best -- Dan Ford
email: www.danford.net/letters.htm#9

see the Warbird's Forum at www.warbirdforum.com
and the Piper Cub Forum at www.pipercubforum.com