That is correct.
If you used TurboTax Online, simply log in to your account and select Amend a return that was filed and accepted.
If you used the CD/download product, sign back into your return and select Amend a filed return.
You must file a separate Form 1040-X for each tax return you are amending.
See also this TurboTax Help.
@zhangqimin17
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