I love when client tells me the salesman said…. I tell them to have the salesman do their tax return…. Just read the instructions, you’ll do it correctly 

edit:   I installed the first solar panels in 1985. The salesman told me that it was renewable energy as long as the sun kept circling,  and not only was the energy renewable but so was the tax credit… so after an initial investment of only  $8650 …the tax credit has amounted to 73,432.