any insurance?. the IRS will not allow you to deduct any portion of the loss covered by insurance. other than that you can use form 4684 section B to report a business casualty loss. do not enter it on schedule C.
it's under the deductions and credits tab - other deductions and credits - casualty and thefts
if entered correctly you should see the loss on schedule 1 line 4 with an indication form 4684