Energy credit showing zero even though I made qualified improvement to main residence

[bwqwer123]

I replaced exterior windows of my main residence last year. The new windows are energy efficient. However, the energy credit shows zero, and I don't understand why.  

[ThomasM125]

One possibility is that your income tax has been reduced to $0 by other credits or the level of your income. The energy credit cannot be used in that case, but can be carried over to future years. You can look at your tax summary to see:

1. Choose Tax Tools from your left menu bar in TurboTax Online while working in your program
2. Choose Tools
3. Choose View Tax Summary