You can file form 3115 to correct the mistake. However, this is complicated and not supported by Turbotax. We usually recommend having an accountant prepare the form. That might cost more than the benefit. I suppose you could place the heat pump in service this year (using the current fair market value, rather than the purchase price) and you will at least get something going forward.
*Answers are correct to the best of my ability at the time of posting but do not constitute legal or tax advice.*
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