If the tax forms and schedules included in your tax return are not yet available for filing then you cannot choose the optional Refund Process Service to the pay the TurboTax account fees from the federal tax refund along with the RPS fee of $39.99.  You do Not have to pay for the TurboTax account at this time and can wait for the tax forms and schedules to be finalized.

Click on Review and there will be a list of forms and schedules with the dates 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...

The IRS will not be accepting any type of 2017 tax return until January 29, 2018

The IRS will hold all 2017 tax returns that have a tax refund which includes EIC and/or the Additional Child Tax Credit util mid-February.  They will release the tax refunds in late February if there are no errors on the tax return.