Get your taxes done using TurboTax

The software is nowhere yet finalized for tax year 2018.  There will be several updates during December and January so what you are experiencing now should be corrected in the next few updates.
The IRS has yet to announce when they will be accepting any type of 2018 tax return, but it probably will not be until sometime near the end of January or maybe even February due to the tax code changes and the changes to the federal tax forms.