qbteachmt
Level 15

The IRS knows:

https://www.irs.gov/newsroom/energy-incentives-for-individuals-residential-property-updated-question...

https://www.irs.gov/instructions/i5695

TurboTax knows:

https://turbotax.intuit.com/tax-tips/going-green/federal-tax-credit-for-solar-energy/L7s9ZiB4D

Often, the installer does not know. They know nothing about your client's finances, typically.

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