What exactly are you trying to enter? Is it listed as a Energy Efficient Home Improvement Credit? Such as insulation, windows, doors, A/C unit, furnace. heat pump, etc.
If your tax liability is 0 (zero) the credit cannot be used.
Look at your tax return, Form 1040 Line 18. What is amount on Line 18?
You can view your Form 1040 plus Schedules 1, 2 and 3 at any time using the online editions. Click on Tax Tools on the left side of the online program screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.
