What does it mean: IRS has not finalized one or more forms

[VolvoGirl]

It means you are trying to file a 2016 return too soon.  Turbo Tax will start taking efiles sometime in early January.  But they will just hold them all until the IRS opens Efiling on Jan 23.  

The IRS will open efiling on Jan 23, 2017

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

 IRS warns of refund delays

https://www.irs.gov/individuals/refund-timing 

[Critter]

First date the form 1040 is expected  be ready to file is 1/6/17 according to the charts ... watch for other forms here:

Availability chart for the 2016 PERSONAL programs:
<a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/1908854-forms-availability-table-for-turbotax-federal-products-exc...>

Availability chart for the 2016 State programs for the Personal returns:
<a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/1908857-forms-availability-table-for-turbotax-state-except-busines...>