You do not redo a prior year tax return that has been filed and accepted by the IRS. You amend the original tax return using IRS Form 1040X.
See this TurboTax support FAQ for amending a tax return originally completed using TurboTax (online or desktop) - https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed
An amended tax return can only be printed and mailed, it cannot be e-filed.
