Deductions & credits

For insulation, you can get a tax credit of 10% of the cost up to $500.    I have attached a TurboTax FAQ with more information. 

These are entered in the Deductions & Credits section:

1. Open (continue) your return in TurboTax.
2. In the search box, search for energy improvements. (Don't search for "energy credit," as this will take you to the wrong place in the program.)
3. Click the "Jump to" link in the search results.
4. At the bottom of the Energy-Saving Home Improvements screen, answer Yes and click Continue.
5. Follow the on-screen instructions.

Tip: You can see which energy-saving home improvements qualify for a federal tax credit at the Energy Star website.