Direct debit from your bank account? Credit Card payment? Pay by check with a voucher? Pay directly on the IRS payment website?
Since the e-filed return continues to be rejected by the IRS for the 2017 AGI, then you have to print and mail the tax return.
See this TurboTax support FAQ for printing a tax return for mailing when using the online editions - https://ttlc.intuit.com/questions/1944348-how-do-i-print-and-mail-my-return-in-turbotax-online