Is there an energy saving credit for 2018 taxes for a geothermal system purchased in March of 2019?

[DoninGA · Accepted solution]

That would be entered on the 2019 tax return filed next year since it was purchased in 2019

The Residential Energy Efficient Property Credit is in effect for 2018 to the end of 2021 - 

Qualified solar electric property, Qualified solar water heating property, Qualified small wind energy property,  Qualified geothermal heat pump property and Qualified fuel cell property costs.