It depends on the nature of the loss and when it occurred.
From the instructions for Form 4684:
"For tax years 2018 through 2025, if you are an individual, casualty and theft losses of personal-use property are deductible only if the losses are attributable to a federally declared disaster (federal casualty loss)."
This means it isn't likely that you can deduct the loss on Form 4684, unless you also had casualty gains during the same year (not common).
It is possible that you may be able to deduct your loss as a nonbusiness bad debt, or a loss on deposits, depending on the nature of the loss.
Click here to learn more.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
