Do i have to mail my return

If you have e-filed your return, you do not have to mail in a paper copy.

In the event your e-filed return is rejected by the IRS, and is unable to be fixed and accepted, then you would have to print, sign and mail a paper return to the IRS.

There are some uncommon situations where additional documentation must be mailed to the IRS with Form 8453.  Please see the link below (which may download a PDF file) for situations this may apply.  TurboTax would have instructed you, if this was your situation.