Final answer:
Warren should report his loss on Schedule A, Itemized Deductions, and Form 4684, Casualties and Thefts.
Step-by-step explanation:
Warren should report his loss on Schedule A, Itemized Deductions, and Form 4684, Casualties and Thefts.
When a taxpayer suffers a casualty loss as a result of a fire or theft, the loss is generally deductible on Schedule A as an itemized deduction. Form 4684 is used to calculate the deductible amount of the loss.
In this case, since Warren did not insure his RV, he can claim a deduction based on its fair market value at the time of the loss, which would be the purchase price minus any depreciation.