I invested in LLC that built homes for sale. Bank foreclosed on property. I lost 100% Is this tax deductable?

Yes on your Schedule D you will put the date you invested and the amount one the basis and for sale price you will put 0 and the date when your investment went under. if you invested in it for over a year, then you will put it in the long term capital gains and loss. look for this information on the capital gains and loss.