Solar installation didn't go trough, IRS rejected due to miscalculations, so I didn't get the credit (36K liability, withheld ~40K). Can I do something?

I was under the impression that if your tax liability was more than the credit and you had your taxes withheld and you were subject to a refund you could get your Solar Tax credit refunded as well.

So I attached form 5695 with the info (couldn't file electronically for some reason, had to do it via snail mail) and got my refund cut in half due to a "Miscalculation" , essentially the Solar credit didn't count.

I had 36K liability, paid over 40K (withheld), was subject to a refund of ~5K   6K of the Solar credit, only got the 5K.

Did I do something wrong? Is this the way it REALLY works?