I have invested about 150K in a foreign company which is floated in the year 2012, the company is closed in 2017. How can i deduct this investment

I have promoted and invested in the foreign company since 2012, we have have invested so far about 150,000. In the year 2017 the local promoter started showing no interest in the company in my last visit I have understood that the company no more exists. How can i deduct or claim these investment amount in turbotax