To deduct a theft loss, you must itemize your deductions on Schedule A. The amount of your deduction is limited to the amount of the loss that exceeds 10% of your Adjusted Gross Income after a $100 deductible
As an example, if you had $5,000 (unreimbursed) stolen, and your Adjusted Gross Income is $40,000, you would gain the following tax benefit.
After deducting $100, you are left with $4,900 which is $900 above your Adjusted Gross Income-$4,000.
Your deduction would therefore be $900.
To enter a theft loss:
Type in theft loss in the search box, top right of your screen, then click the magnifying glass
Click the jump to theft loss link in the search results
Follow to prompts and online instructions