You can e-file a 2017 tax return after all the forms and schedules in your tax return have been finalized and after you have received all the form W-2's and form 1099's from your employers and financial institutions. Click on Review for your forms.
See this TurboTax support FAQ for federal forms availability - https://ttlc.intuit.com/questions/1908854-irs-forms-availability-table-for-turbotax-individual-perso...
The IRS has not yet announced when they will be accepting any type of 2017 tax return, although it is usually sometime in mid to late January.
The IRS will hold all tax refunds that include the Earned Income Credit (EIC) and/or the Additional Child Tax Credit until mid February and release those tax refunds in late February, if the tax return has no errors.
