You can deduct worthless stock only in the tax year it becomes completely worthless.
Enter a worthless stock like any stock sale but with a sales price of zero and the word "worthless" in its description. Enter the correct cost or basis, date acquired, and December 31 as the date sold.
To enter worthless stock as investment sales:
Open (continue) your return in TurboTax.
In the search box, search for investment sales then click the "Jump to" link in the search results.
Answer Yes to the question Did you sell any investments?
If you land on the Here's the investment sales we have so far screen, click Add More Sales.
Answer No to the 1099-B question.
On the next screen, select the type of sale you had (stock, second home, collectible, land etc.) and click Continue.
Continue following the onscreen instructions to enter the sale.
