One more update. I phoned TurboTax about this problem and I was told to wait a few more days to see if a software update is available.
As it happens, I am a tax preparer for the IRS VITA program, so I prepared the tax using that software. The 8615 form is EXACTLY THE SAME. I'm wondering if the "computation error" is on the IRS computers and not within TurboTax.
I think I will resubmit in a couple of days using TurboTax and see what happens. Maybe it's IRS that needs to fix something.
