Using the TurboTax online editions you can create, complete and e-file a tax return up through October 15, 2019. After that date the 2018 tax return can only be printed and mailed. The TurboTax online editions will be shutting down after 10/15/19 to make way for the 2019 online editions.
The TurboTax 2018 desktop editions will be available for the next three years to be used to complete and print the tax return for mailing.