That makes no sense. TurbTax is what I use to do all my Taxes, including Amended. My Amended was done right, as I know what I was supposed to receive when doing it, and at the end of the Amended Tax review, TurboTax and myself were CORRECT.
I don't rely on CPA's to do my taxes. They get overwelmed and make mistakes. It was up to you to know what you were owed. You are at fault, not the CPA.