The energy efficient home improvement credit is for improvements to your main home, which is where you live most of the time. The home must also be located in the United States.
It is also important to note that this credit is nonrefundable, meaning that you will not receive a credit if there is no tax to offset. If this is the case, your credit will carryforward to future years.
If you qualify for the credit based on the above information, please ensure you enter your energy-saving home improvements using TurboTax Online as follows: