After you file


@roadwarrior wrote:

...now I have to do a W1040 for 2017. How can I get the free form 1040 to print and mail?


You can't at this point, at least not from TurboTax. If you want to use TurboTax for your 2017 Form 1040, then you will have to use an installed (CD/Download) product.

 

See https://turbotax.intuit.com/personal-taxes/past-years-products/