CARMAX did not submit a Form 15400

I purchased a used (2023) Chevy Bolt EV from Carmax in June 2024.

My return was rejected by the IRS as they couldn't verify my information.

I contacted CARMAX to get a copy of the report and they said that I wasn't eligible for a tax credit.

This doesn't make sense to me because at the time of sale I talked to the salesman about the tax credits.

My wife and I meet the IRS income requirements.

Question 1 - Were we eligible for a tax credit?

Question 2 - If so, what would it have been? $4,000 or $7,5000

Question 3 - Is there any recourse for us to sue CARMAX for the tax credit.

Thank you,

David Dutton