It means you selected the File by Mail option instead
of e-file or your return is not eligible for e-filing. You will need to print
and mail your return if you want to file a paper return or if your return is
not eligible to e-file.
If you meant to select the File by Mail option and your
return is eligible to e-file, please see this TurboTax FAQ for instructions:
https://ttlc.intuit.com/replies/5561257