Received 2nd stmulus after filing taxes snd completed form to correct.

The information about what the IRS has sent you in stimulus money can be confirmed using the link shown next. This year has been packed with changes and the IRS is allowing some latitude trying to help everyone.  Since TurboTax planned to send emails, give it more time if you signed up for the email notification and you want to change your tax return before it goes to the IRS.

• Get My Payment - Select the button Get My Payment to see if your information is current based on the payments you did receive. If so, then it's another confirmation the IRS will not release the funds a second time.

When your return does get released back to you, and you can make the changes, you will know that your information matches the IRS.  Also, there are two possibilities.

1. The IRS will reject the return in which case you can correct it and immediately resubmit.
2. The IRS accepts the return and automatically makes the adjustment.

It would seem they have a system already in place to make the necessary adjustments or an automatic reject if your return doesn't match their records.