In TurboTax Online, you can prepare and e-file one federal and up to five associated state returns under the same login
For Cd / desktop edition, 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 more information, see
https://ttlc.intuit.com/replies/3403284
https://ttlc.intuit.com/replies/3302087
