No you cannot edit (amend) your return without mailing it. ALL amendments must be mailed in because amendments cannot not be e-filed (electronically submitted).
NOTE: If you decide to amend the IRS 2016 Amended tax forms will not be ready until sometime in February. You will have to mail your amended return to the IRS.
See How to Amend (Change or Correct) a Return You Already Filed to amend your income tax return. Please keep checking the TurboTax FAQ for the status of amended return tax forms.