I'm experiencing the same bug and spent about 2 hours on the phone with TT walking them through it a couple of days ago. I supplied a diagnostic code for them as well. I'm still waiting to hear back from them.
Can anyone confirm that you can't efile if you override calculations on the interest deduction worksheet? I didn't know this. I generally prefer not to alter the 1098's if possible. I'm already annoyed at having to spend so much time troubleshooting their programming error after spending $50 for the software. I'll definitely be requesting a refund if they don't fix this and I can't efile. I'll also be looking for new tax software to use despite using TT for the last 12 years. This is ridiculous for such a simple and common tax situation.
In case it helps them narrow down the issue, I'm using the download version (desktop) for Mac. What version is everyone else using that's seeing this error? Maybe it's only affecting one of the versions and they can apply a solution from a version that does work correctly.
I'm also very concerned that this was an issue in 2019 that seems like it was never fixed. Aside from the frustration we're all experiencing trying to sort out workarounds, imagine how many people didn't catch this software error when they filed their taxes and have no idea they overpaid their taxes. It looks like Turbo Tax calculated too much tax liability for just about everyone who refinanced in 2019 (and now 2020) with a loan balance of at least half of the federal limit (or even smaller loan balances if they had more than 2 1098's). This seems like a class action lawsuit waiting to happen if they continue to show no interest in fixing it. Hopefully someone from TurboTax chimes in soon with a fix or an ETA for the fix.
