I'm sure quite a few people accuse TurboTax of making a mistake on a form, and I'm also pretty sure 99.9% of the time it's user error. Please slow down and take a minute to really look at this post, because this is not one of them. TurboTax's online extension webiste really calculated Part I Line 6 backwards on my extension!
I just eFiled Form 4868 (extension) at https://turbotax.intuit.com/irs-tax-extensions/
I entered an estimate of total tax liability for 2021 of $12,100, and total 2021 payments of $14,283. The TurboTax website told me good news, that I was expecting a refund of $2,183. It then asked, without showing me the form itself, if I wanted to eFile. I of course submitted it, because all seemed well. At the end, it asked me if I wanted to download my eFiled Form 4868. I did, and I see TurboTax did the subtraction backwards!
Line 6 says "Subtract line 5 from line 4." That means $12,100 - $14,283. Per the instructions, "If line 5 is more than line 4, enter -0-." Instead of following the instructions and entering 0, they subtracted it backwards and did $14,283 - $12,100.
I'm expecting to have a $2,183 refund. Not a $2,183 balance due.
Did TurboTax just file a ton of extensions wrong for people, stating balances due for people expecting refunds, and maybe $0 due for people expecting to owe money? I think a lot of people don't download the form after, most who do probably don't open it, and most who do probably don't catch the mistake.
