The 2017 TurboTax program will have the estimated tax Form 1040-ES for 2018 available once the IRS approves the forms. The program will have the section updated for estimating 2018 taxes after the IRS has issued the worksheets which are included for the 1040-ES.
See this TurboTax support FAQ for IRS forms availability (dates subject to change) - https://ttlc.intuit.com/questions/1908854-irs-forms-availability-table-for-turbotax-individual-perso...
Note - The TurboTax 2017 software was updated for the 2018 Form 1040-ES.
See this TurboTax support FAQ -
https://ttlc.intuit.com/questions/2584228-can-turbotax-calculate-next-year-s-federal-estimated-taxes
