Once you enter all of your tax information, you will be insturcted to pay your TurboTax fees, if any, and to choose how you want to file your tax return. If you choose to have it filed electronically, then once you complete the necessary disclaimer and release forms in TurboTax, the return will be filed for you and no additional work is required. You will receive an e-mail notifying you when the return is accepted or if it is rejected, steps necessary to file it again.
If you choose to mail your return in, you will be instructed to print it out, sign it, attach certain forms such as W-2's and you will be provided an address where you need to mail the tax return(s).