How do you write off a loss from a crypto company going bankrupt? Appreciate your help.

It depends when the company completed the bankruptcy.  If the bankruptcy was finalized in 2024, then you would use the amount you paid for the Voyager crypto as a capital loss.  Keep all records associated with the bankruptcy with your tax return, so that you are prepared should the IRS want the information.

This would be considered a capital loss an entered as investment property.  If you have no 1099-B, do not make that selection.

• Where do I enter a capital gain or loss?