After you file

Remove every change you made to the original tax return that was filed.  Wait for the tax refund to be received or the taxes owed and paid to be processed.

Then you must go through the Amend Process to amend the tax return.  The federal amended tax return, Form 1040X, can only be printed and mailed by you to the IRS, it cannot be e-filed.  The IRS takes 3 to 4 months to process an amended tax return.

See this TurboTax support FAQ for amending a tax return - https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed

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