I'd sell enough to at least break even, or maybe pay a little.  If you don't you are leaving a lot of unused deductions.   Also, if you factor the deductions you will be using the price you get for your corn might loook pretty good.

With the higher tax rates next year you will have to have more per bu to equal what you have now.  Someone earlier said you would have to add 50 cents to the price of beans just for the extra taxes and storage if you hold them.