Deductions & credits

For tax year 2023, the insulation must meet or exceed the efficiency standards set by the International Energy Conservation Code for 2021.  So whether your project actually qualifies will depend on what the standard is for your part of the country, and whether the insulation you installed meets that standard.

 

Then, as said, only the cost of materials are allowed.  If your contractor did not break out the price for you, you will have to make a "reasonable allocation."