Yes, you'll need to amend your tax return.
Please be aware that Form 1040X will not be available
in TurboTax until March
7, 2019, but once it is available, you
will be able to prepare and print your amended return so that you can mail it
to the IRS. You cannot e-file an amended return as this cannot
be filed electronically. The form is only filed on paper, so it will need
to be printed and filed by mail.
Please see the
following TurboTax FAQ for
instructions on how to amend your tax return in TurboTax.
https://ttlc.intuit.com/replies/3288565
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