Here is the License Agreement for Turbo Tax Online
https://turbotax.intuit.com/corp/license/online.jsp
See 15 GENERAL
1.2 After proper registration and payment is made, you may file such return(s) electronically or by printing and mailing them to the Internal Revenue Service
It says YOU MAY FILE (not TurboTax and not will be efiled)
And see section 2.2 Electronic Filing Services
