I have a private investment loss of a company that has gone out of business but I cannot get into contact with to get a 1099-B. How do I report this loss?

[ThomasM125]

You don't need the Form 1099-B to report the investment loss in TurboTax.

Enter the transaction in the Wages and Income section of TurboTax, then Investment Income, then Stocks, cryptocurrency, Mutual Funds, Bonds, etc...  Choose Other as the type of investment you want to enter. You'll come to a screen where you can enter in your sales proceeds ($0 in this case) and cost basis. On the screen that says Let us know if any of these situations apply to this account choose This was a worthless security.