After you file

@kaycholewinski - it will all be reconciled on the 2020 tax return; she will not receive it via the 2019 amendment

 

Look at Line 30 of Form 1040 closely as your daughter prepares her 2020 tax return; I suspect the 2nd stimulus will also appear there, but there is limited information currently.  

 

here is the IRS FAQ on the topic 

 

 

A8. Yes, the IRS will continue to process 2019 tax returns and issue payments in 2020 to individuals who have not already received a payment and have not already been determined to be ineligible based on their 2018 tax returns.

If you are in this situation and eligible for an Economic Impact Payment based on your 2019 federal tax return:

  • Your payments will be issued after your return is processed. Check your payment status in Get My Payment .
  • You will receive Notice 1444, Your Economic Impact Payment, after the payment is issued. Keep this notice with your 2020 tax records.

If your return is not processed in time to issue your payment this year, you may be eligible to claim the Recovery Rebate Credit when you file your 2020 tax return.