I had similar happen a few years ago. For whatever reason, mine was being rejected because of incorrect prior year AGI too - even though I was providing what I knew was correct and what TurboTax had automatically carried over from prior year. After multiple unsuccessful attempts, I gave up and printed/mailed...which meant I also had to mail the state return. Lost my E-file TurboTax costs that year as a result. Unfortunately, I'm guessing you'll end out having to do the same. If you can't get it resolved today/tomorrow, don't fight it - just print and mail. That still works.
