Winter Storm Damage to Home (Texas)

The wooden deck attached to my home (bought in 2006) was damaged during the freeze in Texas this February. Several footings cracked and the deck settled which now requires repair. Estimates for repair are in the $6-$7k range. My insurance did not cover the loss. 

 

Question: How do I separate out/determine the value of the deck from the value of the house when filling out the form in turbotax? Determining the damage to a car, boat, etc. is fairly straightforward but the deck is attached to the house and I'm unclear on how to separate the value of the deck from the value of the house for claim purposes.

 

Thanks in advance