Capital loss from a invesmtent in a associates business

I invested in a business a year ago that has failed. Is this loss deductible on my personal taxes? If so, what is the proper way to set it up within turbo tax? I have read that capital losses are deductible in the event that the asset is sold, in this case the asset went to 0 and there was nothing to sell. The business was a LLc and I put in around 20k. 

 

Thanks!