The calculation is almost guaranteed to be correct (and technically TurobTax does guarantee that part in the end.)
Your mistake here is that you are assuming your tax calculation is that simple and odds are that it is not. Different parts of your income are taxed at different rates, so your tax isn't a function of just the bottom line taxable income then go to the tax tables but that only works if your income is 100% wages and nothing else (and even then, not always.)
Different parts of your income are taxed at different rates - such as capital gains, and dividends. You mention that you have a 1099-B, which means at your income level you are paying Net Investment Income tax of 3.8% on that income (most likely) but only on that income.
VERY few taxpayers can rely solely on the tax tables to determine their true tax liability. If it were really that simple, we wouldn't need software like TurboTax and we could just do this on pen and paper in a few minutes and be done, but it's not.
The 1098 issue is being corrected as well as other issues as is very common for this time of year, particular when there are many tax law changes.
I would relax, step away, and revisit the return closer to the date the filing season opens. By then the issues like 1098 entries and other items will have worked themselves out and your return will be more likely to be ready to file. The IRS hasn't even finished a fair number of forms and released them for use - so the software companies, all of them, are waiting for those final approvals before they can incorporate the forms.
