The product appears to be missing the ability to claim expense on qualified natural gas furnace. There is no place to enter this value in "Home Energy Credit" questions.

The overview under "Residential Energy Property" includes "Natural gas, propane, or oil furnace or hot water boilers". However, the questions never solicit inputting the cost of a natural gas furnace. How do I enter the cost of a natural gas furnace? How do I get support?