First, you have to wait until the IRS send's you your refund from the tax return you submitted. Then you'll have to amend your income tax return through TurboTax. Don't print out the 1040X amendment form and try to fill it out manually.
At this time, the IRS has not issued the form to TurboTax. The estimate date is March 7, 2019. You may sign up, click here, to receive email notifications when any
updates related to this issue become available.
When they do issue
the form, you'll be able to
amend your income tax return. See
How to amend (change or correct) a return you
already filed
