To
change your method of filing from mail to e-file you can go back into the
return and change it in TurboTax. If there is a reason that you can't
e-file, you should get a message telling you why in the filing section.
See below for
instructions on how to change your filing from paper to e-file in TurboTax.
https://ttlc.intuit.com/replies/3985787