TurboTax entered Taxable Income on Form 1040 line 10 as $70,930 and line 11a Tax as $7,944. But IRS Tax Tables for 2018 show corresponding tax for Married filing jointly as $8,130. Why the difference?
It depends on what kind of income you have, if you have capital gains or qualified dividends the tax on line 11 is not taken from the tax table but is calculated separately from schedule D. The tax will be calculated on the Qualified Dividends and Capital Gain Tax Worksheet. It does not get filed with your return. In the online version you need to save your return as a pdf file and include all worksheets to see it.
For the Desktop version you can switch to Forms Mode and open the worksheet to see it. Click Forms in the upper right (upper left for Mac) and look through the list and open the Qualified Dividends and Capital Gain Tax Worksheet.