Kilowatt capacity is only asked if you have installed any type of fuel cell property. If you did not install any type of fuel cell property then you indicated incorrectly when asked about the Residential Clean Energy Property that you installed.
What type of property did you install on your residence, was it solar/wind/geothermal/battery or was it a Qualified Energy Efficiency Improvement, such as windows, doors, insulation, furnace, A/C, heat pump and the like?