were the livestock and therefore the barn used in a business you had? if not, sorry no deduction. if yes, then you figure your casualty loss to business property by completing Section B of Form 4684, Casualties and Thefts. Turbotax will carry the loss to Form 4797, Sales of Business Property. a federal disaster declaration is not necessary for a business casualty loss.
the same would apply to your home but only to the business portion.
