You cannot file a federal tax return until the forms and schedules that are included with your tax return have been finalized for e-filing. You can see which forms and schedules are not yet finalized by clicking on Review. The section will show you a screen that has the forms and schedules listed along with the date they will be available.
See this TurboTax support FAQ for IRS forms availability - https://ttlc.intuit.com/questions/1908854-irs-forms-availability-table-for-turbotax-individual-perso...
