Do you need notification from our Solar System installer before we can file our tax return?

[JohnW15 · Accepted solution]

Assuming that you're asking for purposes of claiming an energy credit on your return, no. 

As far as filing your return, you don't need to provide any proof of your expenses, whether you eFile or file by mail with a paper return.

You'll still need to retain all of your relevant documents, though, for at least three years, just in the event that you're audited by the IRS.