Yes, you can! You can use the TurboTax software to e-file up to five (5) federal
tax returns. You can prepare as many returns as you want, but only five
can be e-filed.
For returns with multiple states, you can e-file up to three (3)
states per federal return; the rest must be paper-filed (which probably
isn't a big deal, as many nonresident state returns can't be e-filed
anyway).