I wanted to e-file why did it choose mail and I chose efile

Please follow the instructions in this TurboTax Help topic on How do I change from mail to e-file in TurboTax Online?

or

Please follow the instructions in this TurboTax Help topic on How do I change from mail to e-file in the TurboTax CD/Download software?

There might be a form that the IRS is not excepting over E file? Double check your return to make sure you have everything filled out.