What does the IRS hasn't finalized one or more forms mean?

[JohnR1]

It means that the IRS has not yet approved and issued the 2016 version of certain forms and schedules.

Please see the following IRS notification of when it will begin accepting eFiled tax returns for the 2016 tax year:

https://www.irs.gov/uac/2017-tax-filing-season-begins-jan-23-for-nations-taxpayers-with-tax-returns-... 

Please see the following link where you can check when specific forms will be available in TurboTax for Macintosh, Online or for Windows, for either printing or Efiling:

https://ttlc.intuit.com/questions/1908854-irs-forms-availability-table-for-turbotax-individual-perso...