I had a similar issue that makes me think TurboTax Online might have a bug in its tax calculation. In my case the taxable income on line 15 of the 1040 is over $94,000 which should imply a Tax of at least $9,400. Instead line 16 shows a tax of $3,800 and no boxes are checked. I do have qualified dividends but that still wouldn't result in a tax rate under 5%. My first attempt at support through TurboTax did not produce an answer. I'm calling again this morning to see if a different representative can figure something out. I'm posting this in case others are seeing strange calculations on line 16 as it sure looks like a bug to me.
